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Finding the Third Proportional to 20,344 and 33,720

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Solution

The third proportional to 20,344 and 33,720 is: 55,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344 : 33,720 = 33,720 : x
  2. Step 2: Convert to fraction form
    20,344/33,720 = 33,720/x
  3. Step 3: Cross multiply
    20,344x = 33,720 × 33,720
  4. Step 4: Simplify right side
    20,344x = 1,137,038,400
  5. Step 5: Solve for x
    x = 1,137,038,400/20,344
  6. Step 6: Final answer
    x = 55,890.60

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.