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Finding the Third Proportional to 18,981 and 28,530

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Solution

The third proportional to 18,981 and 28,530 is: 42,882.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981 : 28,530 = 28,530 : x
  2. Step 2: Convert to fraction form
    18,981/28,530 = 28,530/x
  3. Step 3: Cross multiply
    18,981x = 28,530 × 28,530
  4. Step 4: Simplify right side
    18,981x = 813,960,900
  5. Step 5: Solve for x
    x = 813,960,900/18,981
  6. Step 6: Final answer
    x = 42,882.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.