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Finding the Third Proportional to 18,874 and 39,279

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Solution

The third proportional to 18,874 and 39,279 is: 81,744.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874 : 39,279 = 39,279 : x
  2. Step 2: Convert to fraction form
    18,874/39,279 = 39,279/x
  3. Step 3: Cross multiply
    18,874x = 39,279 × 39,279
  4. Step 4: Simplify right side
    18,874x = 1,542,839,841
  5. Step 5: Solve for x
    x = 1,542,839,841/18,874
  6. Step 6: Final answer
    x = 81,744.19

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.