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Finding the Third Proportional to 3,960 and 6,170

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Solution

The third proportional to 3,960 and 6,170 is: 9,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960 : 6,170 = 6,170 : x
  2. Step 2: Convert to fraction form
    3,960/6,170 = 6,170/x
  3. Step 3: Cross multiply
    3,960x = 6,170 × 6,170
  4. Step 4: Simplify right side
    3,960x = 38,068,900
  5. Step 5: Solve for x
    x = 38,068,900/3,960
  6. Step 6: Final answer
    x = 9,613.36

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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.