The forth proportional to 20,8,15 is?
Choose the correct choice from the following:
A) 15  B) 6  C) 18  D) 20  E) 24
Let the fourth proportional to 20,8,15 be x   then 20:8::15:x   20x = 8*15   x = 6   Answer is 6
<result>B</result>
The forth proportional to 20,8,15 is?