Home / 20,565.87-28,380.67-11,612.85

Finding the Fourth Proportional to 20,565.87, 28,380.67 and 11,612.85

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Solution

The fourth proportional to 20,565.87, 28,380.67 and 11,612.85 is: 16,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.87 : 28,380.67 = 11,612.85 : x
  2. Step 2: Convert to fraction form
    20,565.87/28,380.67 = 11,612.85/x
  3. Step 3: Cross multiply
    20,565.87x = 28,380.67 × 11,612.85
  4. Step 4: Simplify right side
    20,565.87x = 329,580,463.61
  5. Step 5: Solve for x
    x = 329,580,463.61/20,565.87
  6. Step 6: Final answer
    x = 16,025.60

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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.