Home / 3,138.87-4,331.27-1,862.55

Finding the Fourth Proportional to 3,138.87, 4,331.27 and 1,862.55

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Solution

The fourth proportional to 3,138.87, 4,331.27 and 1,862.55 is: 2,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.87 : 4,331.27 = 1,862.55 : x
  2. Step 2: Convert to fraction form
    3,138.87/4,331.27 = 1,862.55/x
  3. Step 3: Cross multiply
    3,138.87x = 4,331.27 × 1,862.55
  4. Step 4: Simplify right side
    3,138.87x = 8,067,211.59
  5. Step 5: Solve for x
    x = 8,067,211.59/3,138.87
  6. Step 6: Final answer
    x = 2,570.10

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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.