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Finding the Third Proportional to 21,123 and 27,432

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Solution

The third proportional to 21,123 and 27,432 is: 35,625.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123 : 27,432 = 27,432 : x
  2. Step 2: Convert to fraction form
    21,123/27,432 = 27,432/x
  3. Step 3: Cross multiply
    21,123x = 27,432 × 27,432
  4. Step 4: Simplify right side
    21,123x = 752,514,624
  5. Step 5: Solve for x
    x = 752,514,624/21,123
  6. Step 6: Final answer
    x = 35,625.37

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.