Home / 28,520.46-39,358.48-15,772.98

Finding the Fourth Proportional to 28,520.46, 39,358.48 and 15,772.98

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Solution

The fourth proportional to 28,520.46, 39,358.48 and 15,772.98 is: 21,766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.46 : 39,358.48 = 15,772.98 : x
  2. Step 2: Convert to fraction form
    28,520.46/39,358.48 = 15,772.98/x
  3. Step 3: Cross multiply
    28,520.46x = 39,358.48 × 15,772.98
  4. Step 4: Simplify right side
    28,520.46x = 620,800,517.87
  5. Step 5: Solve for x
    x = 620,800,517.87/28,520.46
  6. Step 6: Final answer
    x = 21,766.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.