The first three terms of a proportion are 3, 9 and 12. The fourth term is? Choose the correct choice from the following answers:
A) 15  B) 87  C) 16  D) 36  E) 12
(9*12)/3= 
<gadget id="calculator">(9*12)/3</gadget>
<output>36</output>
36   Answer: 36
<result>D</result>
The first three terms of a proportion are 3, 9 and 12. The fourth term is?