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Finding the Third Proportional to 20,515.50 and 41,868

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Solution

The third proportional to 20,515.50 and 41,868 is: 85,444.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.50 : 41,868 = 41,868 : x
  2. Step 2: Convert to fraction form
    20,515.50/41,868 = 41,868/x
  3. Step 3: Cross multiply
    20,515.50x = 41,868 × 41,868
  4. Step 4: Simplify right side
    20,515.50x = 1,752,929,424
  5. Step 5: Solve for x
    x = 1,752,929,424/20,515.50
  6. Step 6: Final answer
    x = 85,444.15

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.