Home / 3,869.11-5,339.26-2,275.78

Finding the Fourth Proportional to 3,869.11, 5,339.26 and 2,275.78

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Solution

The fourth proportional to 3,869.11, 5,339.26 and 2,275.78 is: 3,140.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.11 : 5,339.26 = 2,275.78 : x
  2. Step 2: Convert to fraction form
    3,869.11/5,339.26 = 2,275.78/x
  3. Step 3: Cross multiply
    3,869.11x = 5,339.26 × 2,275.78
  4. Step 4: Simplify right side
    3,869.11x = 12,150,981.12
  5. Step 5: Solve for x
    x = 12,150,981.12/3,869.11
  6. Step 6: Final answer
    x = 3,140.51

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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.