Home / 3,855.62-5,785.45-2,101.88

Finding the Fourth Proportional to 3,855.62, 5,785.45 and 2,101.88

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Solution

The fourth proportional to 3,855.62, 5,785.45 and 2,101.88 is: 3,153.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.62 : 5,785.45 = 2,101.88 : x
  2. Step 2: Convert to fraction form
    3,855.62/5,785.45 = 2,101.88/x
  3. Step 3: Cross multiply
    3,855.62x = 5,785.45 × 2,101.88
  4. Step 4: Simplify right side
    3,855.62x = 12,160,287.46
  5. Step 5: Solve for x
    x = 12,160,287.46/3,855.62
  6. Step 6: Final answer
    x = 3,153.92

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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.