Home / 3,138.33-4,329.78-2,019.92

Finding the Fourth Proportional to 3,138.33, 4,329.78 and 2,019.92

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Solution

The fourth proportional to 3,138.33, 4,329.78 and 2,019.92 is: 2,786.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.33 : 4,329.78 = 2,019.92 : x
  2. Step 2: Convert to fraction form
    3,138.33/4,329.78 = 2,019.92/x
  3. Step 3: Cross multiply
    3,138.33x = 4,329.78 × 2,019.92
  4. Step 4: Simplify right side
    3,138.33x = 8,745,787.57
  5. Step 5: Solve for x
    x = 8,745,787.57/3,138.33
  6. Step 6: Final answer
    x = 2,786.76

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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.