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Finding the Third Proportional to 7,119 and 15,561

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Solution

The third proportional to 7,119 and 15,561 is: 34,013.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119 : 15,561 = 15,561 : x
  2. Step 2: Convert to fraction form
    7,119/15,561 = 15,561/x
  3. Step 3: Cross multiply
    7,119x = 15,561 × 15,561
  4. Step 4: Simplify right side
    7,119x = 242,144,721
  5. Step 5: Solve for x
    x = 242,144,721/7,119
  6. Step 6: Final answer
    x = 34,013.87

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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.