The fourth proportional to 10, 15 and 18 is?  Pick.
A) 21	B) 27	C) 55	D) 88	E) 61
(15*18)/10= 
<gadget id="calculator">(15*18)/10</gadget>
<output>27</output>
27   Answer:27
<result>B</result>
The fourth proportional to 10, 15 and 18 is?