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Finding the Third Proportional to 20,638 and 26,853

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Solution

The third proportional to 20,638 and 26,853 is: 34,939.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638 : 26,853 = 26,853 : x
  2. Step 2: Convert to fraction form
    20,638/26,853 = 26,853/x
  3. Step 3: Cross multiply
    20,638x = 26,853 × 26,853
  4. Step 4: Simplify right side
    20,638x = 721,083,609
  5. Step 5: Solve for x
    x = 721,083,609/20,638
  6. Step 6: Final answer
    x = 34,939.61

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.