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Finding the Third Proportional to 9,439.88 and 20,001.38

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Solution

The third proportional to 9,439.88 and 20,001.38 is: 42,379.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,439.88 : 20,001.38 = 20,001.38 : x
  2. Step 2: Convert to fraction form
    9,439.88/20,001.38 = 20,001.38/x
  3. Step 3: Cross multiply
    9,439.88x = 20,001.38 × 20,001.38
  4. Step 4: Simplify right side
    9,439.88x = 400,055,001.89
  5. Step 5: Solve for x
    x = 400,055,001.89/9,439.88
  6. Step 6: Final answer
    x = 42,379.27

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.