Quantitative Aptitude Ques 2071
Question: The fourth proportional to 5, 8, 15 is [Canara Bank (PO) 2011]
Options:
A) 18
B) 24
C) 19
D) 20
E) 21
Show Answer
Answer:
Correct Answer: B
Solution:
- Let the fourth proportional be x. Then, $ 5:8::15:x $
$ \Rightarrow $ $ 5\times x=15\times 8 $ $ \because $ Product of extremes = Product of means
$ \Rightarrow $ $ x=\frac{120}{5} $
$ \Rightarrow $ $ x=24 $
BETA
