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Finding the Third Proportional to 3,860 and 7,171

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Solution

The third proportional to 3,860 and 7,171 is: 13,322.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860 : 7,171 = 7,171 : x
  2. Step 2: Convert to fraction form
    3,860/7,171 = 7,171/x
  3. Step 3: Cross multiply
    3,860x = 7,171 × 7,171
  4. Step 4: Simplify right side
    3,860x = 51,423,241
  5. Step 5: Solve for x
    x = 51,423,241/3,860
  6. Step 6: Final answer
    x = 13,322.08

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.