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Finding the Third Proportional to 18,491 and 39,898

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Solution

The third proportional to 18,491 and 39,898 is: 86,087.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491 : 39,898 = 39,898 : x
  2. Step 2: Convert to fraction form
    18,491/39,898 = 39,898/x
  3. Step 3: Cross multiply
    18,491x = 39,898 × 39,898
  4. Step 4: Simplify right side
    18,491x = 1,591,850,404
  5. Step 5: Solve for x
    x = 1,591,850,404/18,491
  6. Step 6: Final answer
    x = 86,087.85

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.