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Finding the Third Proportional to 3,979.13 and 8,157.38

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Solution

The third proportional to 3,979.13 and 8,157.38 is: 16,722.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.13 : 8,157.38 = 8,157.38 : x
  2. Step 2: Convert to fraction form
    3,979.13/8,157.38 = 8,157.38/x
  3. Step 3: Cross multiply
    3,979.13x = 8,157.38 × 8,157.38
  4. Step 4: Simplify right side
    3,979.13x = 66,542,766.89
  5. Step 5: Solve for x
    x = 66,542,766.89/3,979.13
  6. Step 6: Final answer
    x = 16,722.96

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.