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Finding the Third Proportional to 20,920 and 27,732

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Solution

The third proportional to 20,920 and 27,732 is: 36,762.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920 : 27,732 = 27,732 : x
  2. Step 2: Convert to fraction form
    20,920/27,732 = 27,732/x
  3. Step 3: Cross multiply
    20,920x = 27,732 × 27,732
  4. Step 4: Simplify right side
    20,920x = 769,063,824
  5. Step 5: Solve for x
    x = 769,063,824/20,920
  6. Step 6: Final answer
    x = 36,762.13

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.