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Finding the Third Proportional to 20,514 and 40,419

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Solution

The third proportional to 20,514 and 40,419 is: 79,638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514 : 40,419 = 40,419 : x
  2. Step 2: Convert to fraction form
    20,514/40,419 = 40,419/x
  3. Step 3: Cross multiply
    20,514x = 40,419 × 40,419
  4. Step 4: Simplify right side
    20,514x = 1,633,695,561
  5. Step 5: Solve for x
    x = 1,633,695,561/20,514
  6. Step 6: Final answer
    x = 79,638.08

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.