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Finding the Third Proportional to 4,086 and 8,778

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Solution

The third proportional to 4,086 and 8,778 is: 18,857.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086 : 8,778 = 8,778 : x
  2. Step 2: Convert to fraction form
    4,086/8,778 = 8,778/x
  3. Step 3: Cross multiply
    4,086x = 8,778 × 8,778
  4. Step 4: Simplify right side
    4,086x = 77,053,284
  5. Step 5: Solve for x
    x = 77,053,284/4,086
  6. Step 6: Final answer
    x = 18,857.88

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.