Home / 3,909.87-5,395.48-2,231.82

Finding the Fourth Proportional to 3,909.87, 5,395.48 and 2,231.82

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Solution

The fourth proportional to 3,909.87, 5,395.48 and 2,231.82 is: 3,079.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.87 : 5,395.48 = 2,231.82 : x
  2. Step 2: Convert to fraction form
    3,909.87/5,395.48 = 2,231.82/x
  3. Step 3: Cross multiply
    3,909.87x = 5,395.48 × 2,231.82
  4. Step 4: Simplify right side
    3,909.87x = 12,041,740.17
  5. Step 5: Solve for x
    x = 12,041,740.17/3,909.87
  6. Step 6: Final answer
    x = 3,079.83

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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.