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Finding the Third Proportional to 7,679 and 10,866

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Solution

The third proportional to 7,679 and 10,866 is: 15,375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679 : 10,866 = 10,866 : x
  2. Step 2: Convert to fraction form
    7,679/10,866 = 10,866/x
  3. Step 3: Cross multiply
    7,679x = 10,866 × 10,866
  4. Step 4: Simplify right side
    7,679x = 118,069,956
  5. Step 5: Solve for x
    x = 118,069,956/7,679
  6. Step 6: Final answer
    x = 15,375.69

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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.