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Finding the Third Proportional to 10,860 and 16,939

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Solution

The third proportional to 10,860 and 16,939 is: 26,420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,860 : 16,939 = 16,939 : x
  2. Step 2: Convert to fraction form
    10,860/16,939 = 16,939/x
  3. Step 3: Cross multiply
    10,860x = 16,939 × 16,939
  4. Step 4: Simplify right side
    10,860x = 286,929,721
  5. Step 5: Solve for x
    x = 286,929,721/10,860
  6. Step 6: Final answer
    x = 26,420.78

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.