The fourth proportional to 5, 8, 15 is:
Answer & explanation
Correct answer: option 2
Let us consider that , 4th proportional is d
a : b :: c : d
\(\frac{a}{ b }\) = \(\frac{ c }{ d }\)
d = \(\frac{ bc }{ a }\)
Fourth proportional to 5, 8, 15 is:
= \(\frac{ 8 × 15 }{ 5 }\)
= 24
The correct answer is Option (2) → 24