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Finding the Third Proportional to 18,421 and 27,785

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Solution

The third proportional to 18,421 and 27,785 is: 41,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421 : 27,785 = 27,785 : x
  2. Step 2: Convert to fraction form
    18,421/27,785 = 27,785/x
  3. Step 3: Cross multiply
    18,421x = 27,785 × 27,785
  4. Step 4: Simplify right side
    18,421x = 772,006,225
  5. Step 5: Solve for x
    x = 772,006,225/18,421
  6. Step 6: Final answer
    x = 41,909.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.