CUET Preparation Today
CUET
General Test
Numerical Ability
Ratios
If X, Y, Z and W are in proportion. X = 3, Y = 13 and W = 39, determine Z.
5
20
15
9
Fourth proportion of A, B, C = $\frac{B\;\times\;C}{A}$
Z = \(\frac{X\; \times\; W}{Y}\)
= \(\frac{3\; \times\; 39}{13}\)
= 9
