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Finding the Third Proportional to 8,391.38 and 11,355.19

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Solution

The third proportional to 8,391.38 and 11,355.19 is: 15,365.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.38 : 11,355.19 = 11,355.19 : x
  2. Step 2: Convert to fraction form
    8,391.38/11,355.19 = 11,355.19/x
  3. Step 3: Cross multiply
    8,391.38x = 11,355.19 × 11,355.19
  4. Step 4: Simplify right side
    8,391.38x = 128,940,283.16
  5. Step 5: Solve for x
    x = 128,940,283.16/8,391.38
  6. Step 6: Final answer
    x = 15,365.81

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.