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Finding the Third Proportional to 20,987 and 32,757

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Solution

The third proportional to 20,987 and 32,757 is: 51,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987 : 32,757 = 32,757 : x
  2. Step 2: Convert to fraction form
    20,987/32,757 = 32,757/x
  3. Step 3: Cross multiply
    20,987x = 32,757 × 32,757
  4. Step 4: Simplify right side
    20,987x = 1,073,021,049
  5. Step 5: Solve for x
    x = 1,073,021,049/20,987
  6. Step 6: Final answer
    x = 51,127.89

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.