Home / 3,142.12-4,339.46-2,879.64

Finding the Fourth Proportional to 3,142.12, 4,339.46 and 2,879.64

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Solution

The fourth proportional to 3,142.12, 4,339.46 and 2,879.64 is: 3,976.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.12 : 4,339.46 = 2,879.64 : x
  2. Step 2: Convert to fraction form
    3,142.12/4,339.46 = 2,879.64/x
  3. Step 3: Cross multiply
    3,142.12x = 4,339.46 × 2,879.64
  4. Step 4: Simplify right side
    3,142.12x = 12,496,082.59
  5. Step 5: Solve for x
    x = 12,496,082.59/3,142.12
  6. Step 6: Final answer
    x = 3,976.96

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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.