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Finding the Third Proportional to 6,931 and 8,137

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Solution

The third proportional to 6,931 and 8,137 is: 9,552.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,931 : 8,137 = 8,137 : x
  2. Step 2: Convert to fraction form
    6,931/8,137 = 8,137/x
  3. Step 3: Cross multiply
    6,931x = 8,137 × 8,137
  4. Step 4: Simplify right side
    6,931x = 66,210,769
  5. Step 5: Solve for x
    x = 66,210,769/6,931
  6. Step 6: Final answer
    x = 9,552.85

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.