The fourth proportional to 6, 14 and 18 is?
Select
A) 21 B) 42 C) 77 D) 88 E) 99
(14*18)/6= 
<gadget id="calculator">(14*18)/6</gadget>
<output>42</output>
42   Answer: 42
<result>B</result>
The fourth proportional to 6, 14 and 18 is?