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Finding the Third Proportional to 13,306.50 and 20,469

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Solution

The third proportional to 13,306.50 and 20,469 is: 31,486.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,306.50 : 20,469 = 20,469 : x
  2. Step 2: Convert to fraction form
    13,306.50/20,469 = 20,469/x
  3. Step 3: Cross multiply
    13,306.50x = 20,469 × 20,469
  4. Step 4: Simplify right side
    13,306.50x = 418,979,961
  5. Step 5: Solve for x
    x = 418,979,961/13,306.50
  6. Step 6: Final answer
    x = 31,486.86

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.