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Finding the Third Proportional to 7,864 and 11,147

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Solution

The third proportional to 7,864 and 11,147 is: 15,800.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,864 : 11,147 = 11,147 : x
  2. Step 2: Convert to fraction form
    7,864/11,147 = 11,147/x
  3. Step 3: Cross multiply
    7,864x = 11,147 × 11,147
  4. Step 4: Simplify right side
    7,864x = 124,255,609
  5. Step 5: Solve for x
    x = 124,255,609/7,864
  6. Step 6: Final answer
    x = 15,800.56

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.