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Finding the Third Proportional to 20,891 and 43,165

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Solution

The third proportional to 20,891 and 43,165 is: 89,187.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891 : 43,165 = 43,165 : x
  2. Step 2: Convert to fraction form
    20,891/43,165 = 43,165/x
  3. Step 3: Cross multiply
    20,891x = 43,165 × 43,165
  4. Step 4: Simplify right side
    20,891x = 1,863,217,225
  5. Step 5: Solve for x
    x = 1,863,217,225/20,891
  6. Step 6: Final answer
    x = 89,187.56

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.