Home / 3,138.66-4,318.56-2,879.46

Finding the Fourth Proportional to 3,138.66, 4,318.56 and 2,879.46

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Solution

The fourth proportional to 3,138.66, 4,318.56 and 2,879.46 is: 3,961.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.66 : 4,318.56 = 2,879.46 : x
  2. Step 2: Convert to fraction form
    3,138.66/4,318.56 = 2,879.46/x
  3. Step 3: Cross multiply
    3,138.66x = 4,318.56 × 2,879.46
  4. Step 4: Simplify right side
    3,138.66x = 12,435,120.78
  5. Step 5: Solve for x
    x = 12,435,120.78/3,138.66
  6. Step 6: Final answer
    x = 3,961.92

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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.