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Finding the Third Proportional to 4,539 and 9,561

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Solution

The third proportional to 4,539 and 9,561 is: 20,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,539 : 9,561 = 9,561 : x
  2. Step 2: Convert to fraction form
    4,539/9,561 = 9,561/x
  3. Step 3: Cross multiply
    4,539x = 9,561 × 9,561
  4. Step 4: Simplify right side
    4,539x = 91,412,721
  5. Step 5: Solve for x
    x = 91,412,721/4,539
  6. Step 6: Final answer
    x = 20,139.40

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.