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Finding the Third Proportional to 6,690 and 11,949

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Solution

The third proportional to 6,690 and 11,949 is: 21,342.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,690 : 11,949 = 11,949 : x
  2. Step 2: Convert to fraction form
    6,690/11,949 = 11,949/x
  3. Step 3: Cross multiply
    6,690x = 11,949 × 11,949
  4. Step 4: Simplify right side
    6,690x = 142,778,601
  5. Step 5: Solve for x
    x = 142,778,601/6,690
  6. Step 6: Final answer
    x = 21,342.09

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.