Home / 4,255.28-5,870.64-3,138.87

Finding the Fourth Proportional to 4,255.28, 5,870.64 and 3,138.87

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Solution

The fourth proportional to 4,255.28, 5,870.64 and 3,138.87 is: 4,330.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,255.28 : 5,870.64 = 3,138.87 : x
  2. Step 2: Convert to fraction form
    4,255.28/5,870.64 = 3,138.87/x
  3. Step 3: Cross multiply
    4,255.28x = 5,870.64 × 3,138.87
  4. Step 4: Simplify right side
    4,255.28x = 18,427,175.78
  5. Step 5: Solve for x
    x = 18,427,175.78/4,255.28
  6. Step 6: Final answer
    x = 4,330.43

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Half scale
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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.