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Finding the Third Proportional to 20,399 and 28,724.50

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Solution

The third proportional to 20,399 and 28,724.50 is: 40,447.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399 : 28,724.50 = 28,724.50 : x
  2. Step 2: Convert to fraction form
    20,399/28,724.50 = 28,724.50/x
  3. Step 3: Cross multiply
    20,399x = 28,724.50 × 28,724.50
  4. Step 4: Simplify right side
    20,399x = 825,096,900.25
  5. Step 5: Solve for x
    x = 825,096,900.25/20,399
  6. Step 6: Final answer
    x = 40,447.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.