The fourth proportional to \(5, 8, 15\) is:
Answer: D
Let the fourth proportional to \(5, 8 , 15\) be \(x.\)
Then, \(5 : 8 : 15 : x\)
\(\Rightarrow 5x = (8 \times 15)\)
\(x = \frac{(8 \times 15)}{5} = 24.\)