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Finding the Third Proportional to 5,156 and 6,866

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Solution

The third proportional to 5,156 and 6,866 is: 9,143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156 : 6,866 = 6,866 : x
  2. Step 2: Convert to fraction form
    5,156/6,866 = 6,866/x
  3. Step 3: Cross multiply
    5,156x = 6,866 × 6,866
  4. Step 4: Simplify right side
    5,156x = 47,141,956
  5. Step 5: Solve for x
    x = 47,141,956/5,156
  6. Step 6: Final answer
    x = 9,143.13

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.