Home / 3,976.29-5,975.19-2,128.68

Finding the Fourth Proportional to 3,976.29, 5,975.19 and 2,128.68

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Solution

The fourth proportional to 3,976.29, 5,975.19 and 2,128.68 is: 3,198.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.29 : 5,975.19 = 2,128.68 : x
  2. Step 2: Convert to fraction form
    3,976.29/5,975.19 = 2,128.68/x
  3. Step 3: Cross multiply
    3,976.29x = 5,975.19 × 2,128.68
  4. Step 4: Simplify right side
    3,976.29x = 12,719,267.45
  5. Step 5: Solve for x
    x = 12,719,267.45/3,976.29
  6. Step 6: Final answer
    x = 3,198.78

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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.