15
A is directly proportional to B.
When A = 3, B = 6.
Find the value of A when B = 12
Proportionality
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1
0.5
B is directly proportional to C.
When B = 14, C = 7.
Find the value of B when C = 5
Proportionality
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2
50
C is directly proportional to D.
When C = 27, D = 9.
Find the value of C when D = 6
Proportionality
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3
6
D is inversely proportional to F.
When D = 4, F = 12.
Find the value of D when F = 6
Proportionality
www.mathsbox.org.uk
4
125
E is inversely proportional to F.
When E = 6, F = 5.
Find the value of E when F = 60
Proportionality
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5
108
F is inversely proportional to G.
When F = 3, G = 8.
Find the value of F when G = 6
Proportionality
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6
9
G is proportional to the square
of H. When G = 80, H = 4.
Find the value of G when H = 5
Proportionality
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7
1
H is proportional to the square
of J. When H = 36, J = 3.
Find the value of H when J = 8
Proportionality
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8
37.5
J is proportional to the square of
M. When J = 108, M = 6.
Find the value of J when M = 7
Proportionality
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9
100
M is proportional to the square
root of N. When M = 12, N = 9.
Find the value of M when N = 25
Proportionality
www.mathsbox.org.uk
10
4.5
N is proportional to the square
root of P. When N = 35, P = 49.
Find the value of N when P = 100
Proportionality
www.mathsbox.org.uk
11
256
P is proportional to the cube of
Q. When P = 500 Q = 5.
Find the value of P when Q = 3
Proportionality
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12
8
Q is inversely proportional to the
square of R. When Q = 2, R = 6.
Find the value of Q when R = 4
Proportionality
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13
18
R is inversely proportional to the
square of S. When R = 4, S = 10.
Find the value of R when S = 2
Proportionality
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14
20
S is inversely proportional
to the square root of T.
When S = 5, T = 4.
Find the value of S when T = 25
Proportionality
www.mathsbox.org.uk
15
30
T is inversely proportional
to the square root of U.
When T = 15, U = 25.
Find the value of T when U = 4
Proportionality
www.mathsbox.org.uk
16
147
U is inversely proportional to the
cube of V. When U = 8, V = 2.
Find the value of U when V = 4
Proportionality
www.mathsbox.org.uk
17
4
V is inversely proportional to W.
When V = 36, W = 3.
Find the value of V when W = 12
Proportionality
www.mathsbox.org.uk
18
10
W is inversely proportional to
the cube root of Y.
When W = 10, Y = 27.
Find the value of W when Y = 8
Proportionality
www.mathsbox.org.uk
19
2
Y is inversely proportional to the
cube root of Z.
When Y = 5, Z = 216.
Find the value of Y when Z = 1.
Proportionality
www.mathsbox.org.uk
20
www.mathsbox.org.uk
Proportionality
Answer Sheet