The fourth proportion to 5, 8, 15 is-
A. 18
B. 20
C. 21
D. 24
Answer: Option D
Solution(By Examveda Team)
Let the fourth proportional to 5, 8, 15 be x.Then,
$$\eqalign{ & \Rightarrow 5:8:15:x \cr & \Rightarrow 5x = 8 \times 15 \cr & \Rightarrow x = \frac{{8 \times 15}}{5} = 24. \cr} $$
This Question Belongs to Arithmetic Ability >> Ratio
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