Home / 3,138.92-4,330.46-2,142.60

Finding the Fourth Proportional to 3,138.92, 4,330.46 and 2,142.60

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Solution

The fourth proportional to 3,138.92, 4,330.46 and 2,142.60 is: 2,955.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.92 : 4,330.46 = 2,142.60 : x
  2. Step 2: Convert to fraction form
    3,138.92/4,330.46 = 2,142.60/x
  3. Step 3: Cross multiply
    3,138.92x = 4,330.46 × 2,142.60
  4. Step 4: Simplify right side
    3,138.92x = 9,278,443.60
  5. Step 5: Solve for x
    x = 9,278,443.60/3,138.92
  6. Step 6: Final answer
    x = 2,955.94

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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.