If 12 : 18 :: x : 9, then find the value of x  Choose the correct choice.
A) 2 B) 4 C) 6 D) 8 E) 10
Explanation:
Treat 12:18 as 12/18 and x:9 as x/9, treat :: as = So we get 12/18 = x/9
=&gt; 18x = 108
=&gt; x = 6 Option 6
<result>C</result>
If 12 : 18 :: x : 9, then find the value of x