Home / 9,138.40-13,711.20-3,590.80

Finding the Fourth Proportional to 9,138.40, 13,711.20 and 3,590.80

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Solution

The fourth proportional to 9,138.40, 13,711.20 and 3,590.80 is: 5,387.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.40 : 13,711.20 = 3,590.80 : x
  2. Step 2: Convert to fraction form
    9,138.40/13,711.20 = 3,590.80/x
  3. Step 3: Cross multiply
    9,138.40x = 13,711.20 × 3,590.80
  4. Step 4: Simplify right side
    9,138.40x = 49,234,176.96
  5. Step 5: Solve for x
    x = 49,234,176.96/9,138.40
  6. Step 6: Final answer
    x = 5,387.61

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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.