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Finding the Third Proportional to 8,782 and 11,831

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Solution

The third proportional to 8,782 and 11,831 is: 15,938.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782 : 11,831 = 11,831 : x
  2. Step 2: Convert to fraction form
    8,782/11,831 = 11,831/x
  3. Step 3: Cross multiply
    8,782x = 11,831 × 11,831
  4. Step 4: Simplify right side
    8,782x = 139,972,561
  5. Step 5: Solve for x
    x = 139,972,561/8,782
  6. Step 6: Final answer
    x = 15,938.57

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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.