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Finding the Third Proportional to 8,931 and 9,939

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Solution

The third proportional to 8,931 and 9,939 is: 11,060.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931 : 9,939 = 9,939 : x
  2. Step 2: Convert to fraction form
    8,931/9,939 = 9,939/x
  3. Step 3: Cross multiply
    8,931x = 9,939 × 9,939
  4. Step 4: Simplify right side
    8,931x = 98,783,721
  5. Step 5: Solve for x
    x = 98,783,721/8,931
  6. Step 6: Final answer
    x = 11,060.77

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.