Home / 3,981.92-5,494.11-2,785.42

Finding the Fourth Proportional to 3,981.92, 5,494.11 and 2,785.42

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Solution

The fourth proportional to 3,981.92, 5,494.11 and 2,785.42 is: 3,843.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.92 : 5,494.11 = 2,785.42 : x
  2. Step 2: Convert to fraction form
    3,981.92/5,494.11 = 2,785.42/x
  3. Step 3: Cross multiply
    3,981.92x = 5,494.11 × 2,785.42
  4. Step 4: Simplify right side
    3,981.92x = 15,303,403.88
  5. Step 5: Solve for x
    x = 15,303,403.88/3,981.92
  6. Step 6: Final answer
    x = 3,843.22

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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.