Home / 20,517.80-30,745.92-15,830.78

Finding the Fourth Proportional to 20,517.80, 30,745.92 and 15,830.78

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Solution

The fourth proportional to 20,517.80, 30,745.92 and 15,830.78 is: 23,722.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.80 : 30,745.92 = 15,830.78 : x
  2. Step 2: Convert to fraction form
    20,517.80/30,745.92 = 15,830.78/x
  3. Step 3: Cross multiply
    20,517.80x = 30,745.92 × 15,830.78
  4. Step 4: Simplify right side
    20,517.80x = 486,731,972.28
  5. Step 5: Solve for x
    x = 486,731,972.28/20,517.80
  6. Step 6: Final answer
    x = 23,722.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.