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Finding the Third Proportional to 7,121 and 11,441

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Solution

The third proportional to 7,121 and 11,441 is: 18,381.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121 : 11,441 = 11,441 : x
  2. Step 2: Convert to fraction form
    7,121/11,441 = 11,441/x
  3. Step 3: Cross multiply
    7,121x = 11,441 × 11,441
  4. Step 4: Simplify right side
    7,121x = 130,896,481
  5. Step 5: Solve for x
    x = 130,896,481/7,121
  6. Step 6: Final answer
    x = 18,381.76

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.