Home / 3,858.20-5,789.40-2,103.10

Finding the Fourth Proportional to 3,858.20, 5,789.40 and 2,103.10

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Solution

The fourth proportional to 3,858.20, 5,789.40 and 2,103.10 is: 3,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.20 : 5,789.40 = 2,103.10 : x
  2. Step 2: Convert to fraction form
    3,858.20/5,789.40 = 2,103.10/x
  3. Step 3: Cross multiply
    3,858.20x = 5,789.40 × 2,103.10
  4. Step 4: Simplify right side
    3,858.20x = 12,175,687.14
  5. Step 5: Solve for x
    x = 12,175,687.14/3,858.20
  6. Step 6: Final answer
    x = 3,155.79

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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.