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Sticky Note
In the proportion 6 : x :: 9 : 12, the value of x is?
  1. 9
  2. 8
  3. 6
  4. None of these
Explanation

Given the proportion:

6 : x :: 9 : 12

We can write it as:

6/x = 9/12

Cross-multiplying:

6 × 12 = 9 × x

72 = 9x

x = 72/9

x = 8

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