Home / 3,879.50-5,352.78-2,286.21

Finding the Fourth Proportional to 3,879.50, 5,352.78 and 2,286.21

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Solution

The fourth proportional to 3,879.50, 5,352.78 and 2,286.21 is: 3,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.50 : 5,352.78 = 2,286.21 : x
  2. Step 2: Convert to fraction form
    3,879.50/5,352.78 = 2,286.21/x
  3. Step 3: Cross multiply
    3,879.50x = 5,352.78 × 2,286.21
  4. Step 4: Simplify right side
    3,879.50x = 12,237,583.97
  5. Step 5: Solve for x
    x = 12,237,583.97/3,879.50
  6. Step 6: Final answer
    x = 3,154.42

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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.