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Finding the Third Proportional to 18,778 and 28,108

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Solution

The third proportional to 18,778 and 28,108 is: 42,073.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778 : 28,108 = 28,108 : x
  2. Step 2: Convert to fraction form
    18,778/28,108 = 28,108/x
  3. Step 3: Cross multiply
    18,778x = 28,108 × 28,108
  4. Step 4: Simplify right side
    18,778x = 790,059,664
  5. Step 5: Solve for x
    x = 790,059,664/18,778
  6. Step 6: Final answer
    x = 42,073.69

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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.