The first three terms of a proportion are 3, 9 and 12. The fourth term is?	Choose the correct choice:  A) 33  B) 20  C) 28  D) 36  E) 11
(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?