Home / 5,639.87-7,789.16-3,876.59

Finding the Fourth Proportional to 5,639.87, 7,789.16 and 3,876.59

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Solution

The fourth proportional to 5,639.87, 7,789.16 and 3,876.59 is: 5,353.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.87 : 7,789.16 = 3,876.59 : x
  2. Step 2: Convert to fraction form
    5,639.87/7,789.16 = 3,876.59/x
  3. Step 3: Cross multiply
    5,639.87x = 7,789.16 × 3,876.59
  4. Step 4: Simplify right side
    5,639.87x = 30,195,321.44
  5. Step 5: Solve for x
    x = 30,195,321.44/5,639.87
  6. Step 6: Final answer
    x = 5,353.91

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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.