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Finding the Third Proportional to 3,261 and 7,147

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Solution

The third proportional to 3,261 and 7,147 is: 15,663.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,261 : 7,147 = 7,147 : x
  2. Step 2: Convert to fraction form
    3,261/7,147 = 7,147/x
  3. Step 3: Cross multiply
    3,261x = 7,147 × 7,147
  4. Step 4: Simplify right side
    3,261x = 51,079,609
  5. Step 5: Solve for x
    x = 51,079,609/3,261
  6. Step 6: Final answer
    x = 15,663.79

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.