The fourth proportional to 28, 14 and 18 is?
Pick.
A) 2
B) 6
C) 7
D) 8
E) 9
(14*18)/28= 
<gadget id="calculator">(14*18)/28</gadget>
<output>9</output>
9   Answer: 9
<result>E</result>
The fourth proportional to 28, 14 and 18 is?