Find the third proportional to 9 and 12?  Choose the most appropriate option:
A) 10  B) 12  C) 16  D) 19  E) 20
Formula = Third proportional = (b × b)/a   A = 9 and B = 12   (12 × 12)/ 9 = 144/9= 
<gadget id="calculator">144/9</gadget>
<output>16</output>
16   16
<result>C</result>
Find the third proportional to 9 and 12?