Home / 3,876.20-5,349.19-2,107.87

Finding the Fourth Proportional to 3,876.20, 5,349.19 and 2,107.87

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Solution

The fourth proportional to 3,876.20, 5,349.19 and 2,107.87 is: 2,908.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.20 : 5,349.19 = 2,107.87 : x
  2. Step 2: Convert to fraction form
    3,876.20/5,349.19 = 2,107.87/x
  3. Step 3: Cross multiply
    3,876.20x = 5,349.19 × 2,107.87
  4. Step 4: Simplify right side
    3,876.20x = 11,275,412.52
  5. Step 5: Solve for x
    x = 11,275,412.52/3,876.20
  6. Step 6: Final answer
    x = 2,908.88

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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.