Home / 3,855.27-5,320.28-2,086.88

Finding the Fourth Proportional to 3,855.27, 5,320.28 and 2,086.88

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Solution

The fourth proportional to 3,855.27, 5,320.28 and 2,086.88 is: 2,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.27 : 5,320.28 = 2,086.88 : x
  2. Step 2: Convert to fraction form
    3,855.27/5,320.28 = 2,086.88/x
  3. Step 3: Cross multiply
    3,855.27x = 5,320.28 × 2,086.88
  4. Step 4: Simplify right side
    3,855.27x = 11,102,785.93
  5. Step 5: Solve for x
    x = 11,102,785.93/3,855.27
  6. Step 6: Final answer
    x = 2,879.90

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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.