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Finding the Third Proportional to 21,690 and 29,463

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Solution

The third proportional to 21,690 and 29,463 is: 40,021.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690 : 29,463 = 29,463 : x
  2. Step 2: Convert to fraction form
    21,690/29,463 = 29,463/x
  3. Step 3: Cross multiply
    21,690x = 29,463 × 29,463
  4. Step 4: Simplify right side
    21,690x = 868,068,369
  5. Step 5: Solve for x
    x = 868,068,369/21,690
  6. Step 6: Final answer
    x = 40,021.59

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.