The first three terms of a proportion are 3, 9 and 12. The fourth term is?
Select:
A) 6	B) 36	C) 5	D) 25	E) 30
Explanation:   (9*12)/3= 
<gadget id="calculator">(9*12)/3</gadget>
<output>36</output>
36   ANSWER 36
<result>B</result>
The first three terms of a proportion are 3, 9 and 12. The fourth term is?