The fourth proportional to 10, 14 and 18 is? Choices
A) 12 B) 13 C) 10 D) 18 E) 15
(10*18)/12= 
<gadget id="calculator">(10*18)/12</gadget>
<output>15</output>
15   ANSW15R:15
<result>E</result>
The fourth proportional to 10, 14 and 18 is?