A) 18
B) 24
C) 19
D) 20
Correct Answer: B
Solution :
Let the fourth proportional to 5, 8, 15 be x. Then, \[=5:8::15:x\Rightarrow 5x=(8\times 15)\Rightarrow x=\frac{(8\times 15)}{5}=24.\]You need to login to perform this action.
You will be redirected in
3 sec