Home / 3,520.80-5,281.22-2,421.86

Finding the Fourth Proportional to 3,520.80, 5,281.22 and 2,421.86

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Solution

The fourth proportional to 3,520.80, 5,281.22 and 2,421.86 is: 3,632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,520.80 : 5,281.22 = 2,421.86 : x
  2. Step 2: Convert to fraction form
    3,520.80/5,281.22 = 2,421.86/x
  3. Step 3: Cross multiply
    3,520.80x = 5,281.22 × 2,421.86
  4. Step 4: Simplify right side
    3,520.80x = 12,790,375.47
  5. Step 5: Solve for x
    x = 12,790,375.47/3,520.80
  6. Step 6: Final answer
    x = 3,632.80

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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.