The fourth proportional to 5, 8, 15 is:	Options:
A) 18
B) 24
C) 19
D) 20
E) 22
Let the fourth proportional to 5, 8, 15 be x.   Then, 5 : 8 : 15 : x   5x = (8 x 15)   x =	(8 x 15)/5   x=120/5= 
<gadget id="calculator">120/5</gadget>
<output>24</output>
24   Answer: Option 24
<result>B</result>
The fourth proportional to 5, 8, 15 is: