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Finding the Third Proportional to 3,911 and 8,119

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Solution

The third proportional to 3,911 and 8,119 is: 16,854.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911 : 8,119 = 8,119 : x
  2. Step 2: Convert to fraction form
    3,911/8,119 = 8,119/x
  3. Step 3: Cross multiply
    3,911x = 8,119 × 8,119
  4. Step 4: Simplify right side
    3,911x = 65,918,161
  5. Step 5: Solve for x
    x = 65,918,161/3,911
  6. Step 6: Final answer
    x = 16,854.55

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.