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Finding the Third Proportional to 18,531 and 40,769

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Solution

The third proportional to 18,531 and 40,769 is: 89,693.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531 : 40,769 = 40,769 : x
  2. Step 2: Convert to fraction form
    18,531/40,769 = 40,769/x
  3. Step 3: Cross multiply
    18,531x = 40,769 × 40,769
  4. Step 4: Simplify right side
    18,531x = 1,662,111,361
  5. Step 5: Solve for x
    x = 1,662,111,361/18,531
  6. Step 6: Final answer
    x = 89,693.56

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.