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Finding the Third Proportional to 18,107 and 27,981

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Solution

The third proportional to 18,107 and 27,981 is: 43,239.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,107 : 27,981 = 27,981 : x
  2. Step 2: Convert to fraction form
    18,107/27,981 = 27,981/x
  3. Step 3: Cross multiply
    18,107x = 27,981 × 27,981
  4. Step 4: Simplify right side
    18,107x = 782,936,361
  5. Step 5: Solve for x
    x = 782,936,361/18,107
  6. Step 6: Final answer
    x = 43,239.43

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.