Home / 3,138.30-4,329.70-1,879.38

Finding the Fourth Proportional to 3,138.30, 4,329.70 and 1,879.38

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Solution

The fourth proportional to 3,138.30, 4,329.70 and 1,879.38 is: 2,592.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.30 : 4,329.70 = 1,879.38 : x
  2. Step 2: Convert to fraction form
    3,138.30/4,329.70 = 1,879.38/x
  3. Step 3: Cross multiply
    3,138.30x = 4,329.70 × 1,879.38
  4. Step 4: Simplify right side
    3,138.30x = 8,137,151.59
  5. Step 5: Solve for x
    x = 8,137,151.59/3,138.30
  6. Step 6: Final answer
    x = 2,592.85

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1.5x scale

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.