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Finding the Third Proportional to 3,919 and 8,102

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Solution

The third proportional to 3,919 and 8,102 is: 16,749.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919 : 8,102 = 8,102 : x
  2. Step 2: Convert to fraction form
    3,919/8,102 = 8,102/x
  3. Step 3: Cross multiply
    3,919x = 8,102 × 8,102
  4. Step 4: Simplify right side
    3,919x = 65,642,404
  5. Step 5: Solve for x
    x = 65,642,404/3,919
  6. Step 6: Final answer
    x = 16,749.78

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.