Home / 4,138.78-5,711.62-2,275.78

Finding the Fourth Proportional to 4,138.78, 5,711.62 and 2,275.78

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Solution

The fourth proportional to 4,138.78, 5,711.62 and 2,275.78 is: 3,140.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,138.78 : 5,711.62 = 2,275.78 : x
  2. Step 2: Convert to fraction form
    4,138.78/5,711.62 = 2,275.78/x
  3. Step 3: Cross multiply
    4,138.78x = 5,711.62 × 2,275.78
  4. Step 4: Simplify right side
    4,138.78x = 12,998,390.56
  5. Step 5: Solve for x
    x = 12,998,390.56/4,138.78
  6. Step 6: Final answer
    x = 3,140.63

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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.