Home / 3,868.91-5,337.87-2,275.05

Finding the Fourth Proportional to 3,868.91, 5,337.87 and 2,275.05

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Solution

The fourth proportional to 3,868.91, 5,337.87 and 2,275.05 is: 3,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.91 : 5,337.87 = 2,275.05 : x
  2. Step 2: Convert to fraction form
    3,868.91/5,337.87 = 2,275.05/x
  3. Step 3: Cross multiply
    3,868.91x = 5,337.87 × 2,275.05
  4. Step 4: Simplify right side
    3,868.91x = 12,143,921.14
  5. Step 5: Solve for x
    x = 12,143,921.14/3,868.91
  6. Step 6: Final answer
    x = 3,138.85

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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.