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Finding the Third Proportional to 21,672 and 29,436

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Solution

The third proportional to 21,672 and 29,436 is: 39,981.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672 : 29,436 = 29,436 : x
  2. Step 2: Convert to fraction form
    21,672/29,436 = 29,436/x
  3. Step 3: Cross multiply
    21,672x = 29,436 × 29,436
  4. Step 4: Simplify right side
    21,672x = 866,478,096
  5. Step 5: Solve for x
    x = 866,478,096/21,672
  6. Step 6: Final answer
    x = 39,981.46

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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.