CUET Preparation Today
CUET
General Test
Numerical Ability
Ratios
What is the fourth proportional to 7, 15 and 21?
29
30
48
45
Using the direct formula,
Fourth proportion of a, b and c = \(\frac{b\; \times\; c}{a}\)
Fourth proportion = \(\frac{15\; \times\; 21}{7}\)
= 45
