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Finding the Third Proportional to 9,478 and 15,561

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Solution

The third proportional to 9,478 and 15,561 is: 25,548.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,478 : 15,561 = 15,561 : x
  2. Step 2: Convert to fraction form
    9,478/15,561 = 15,561/x
  3. Step 3: Cross multiply
    9,478x = 15,561 × 15,561
  4. Step 4: Simplify right side
    9,478x = 242,144,721
  5. Step 5: Solve for x
    x = 242,144,721/9,478
  6. Step 6: Final answer
    x = 25,548.08

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.