The fourth proportional to 5, 8, 15 is: Options
A) 9  B) 24  C) 18  D) 19  E) 20
Let the fourth proportional to 5, 8, 15 be x.   Then, 5 : 8 : 15 : x   5x = (8*15)   x = (8*15)/5= 
<gadget id="calculator">(8*15)/5</gadget>
<output>24</output>
24   ANSWER 24
<result>B</result>
The fourth proportional to 5, 8, 15 is: