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Finding the Third Proportional to 20,979 and 29,220.75

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Solution

The third proportional to 20,979 and 29,220.75 is: 40,700.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979 : 29,220.75 = 29,220.75 : x
  2. Step 2: Convert to fraction form
    20,979/29,220.75 = 29,220.75/x
  3. Step 3: Cross multiply
    20,979x = 29,220.75 × 29,220.75
  4. Step 4: Simplify right side
    20,979x = 853,852,230.56
  5. Step 5: Solve for x
    x = 853,852,230.56/20,979
  6. Step 6: Final answer
    x = 40,700.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.