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Finding the Third Proportional to 4,778 and 8,872

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Solution

The third proportional to 4,778 and 8,872 is: 16,473.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,778 : 8,872 = 8,872 : x
  2. Step 2: Convert to fraction form
    4,778/8,872 = 8,872/x
  3. Step 3: Cross multiply
    4,778x = 8,872 × 8,872
  4. Step 4: Simplify right side
    4,778x = 78,712,384
  5. Step 5: Solve for x
    x = 78,712,384/4,778
  6. Step 6: Final answer
    x = 16,473.92

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.