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Finding the Third Proportional to 20,620 and 33,199

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Solution

The third proportional to 20,620 and 33,199 is: 53,451.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620 : 33,199 = 33,199 : x
  2. Step 2: Convert to fraction form
    20,620/33,199 = 33,199/x
  3. Step 3: Cross multiply
    20,620x = 33,199 × 33,199
  4. Step 4: Simplify right side
    20,620x = 1,102,173,601
  5. Step 5: Solve for x
    x = 1,102,173,601/20,620
  6. Step 6: Final answer
    x = 53,451.68

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.