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Finding the Third Proportional to 15,572.50 and 20,982.75

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Solution

The third proportional to 15,572.50 and 20,982.75 is: 28,272.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.50 : 20,982.75 = 20,982.75 : x
  2. Step 2: Convert to fraction form
    15,572.50/20,982.75 = 20,982.75/x
  3. Step 3: Cross multiply
    15,572.50x = 20,982.75 × 20,982.75
  4. Step 4: Simplify right side
    15,572.50x = 440,275,797.56
  5. Step 5: Solve for x
    x = 440,275,797.56/15,572.50
  6. Step 6: Final answer
    x = 28,272.65

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.