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Finding the Third Proportional to 6,939 and 10,431

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Solution

The third proportional to 6,939 and 10,431 is: 15,680.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,939 : 10,431 = 10,431 : x
  2. Step 2: Convert to fraction form
    6,939/10,431 = 10,431/x
  3. Step 3: Cross multiply
    6,939x = 10,431 × 10,431
  4. Step 4: Simplify right side
    6,939x = 108,805,761
  5. Step 5: Solve for x
    x = 108,805,761/6,939
  6. Step 6: Final answer
    x = 15,680.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.