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Finding the Third Proportional to 15,128 and 20,452

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Solution

The third proportional to 15,128 and 20,452 is: 27,649.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128 : 20,452 = 20,452 : x
  2. Step 2: Convert to fraction form
    15,128/20,452 = 20,452/x
  3. Step 3: Cross multiply
    15,128x = 20,452 × 20,452
  4. Step 4: Simplify right side
    15,128x = 418,284,304
  5. Step 5: Solve for x
    x = 418,284,304/15,128
  6. Step 6: Final answer
    x = 27,649.68

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.