Home / 3,879.16-5,356.22-2,387.76

Finding the Fourth Proportional to 3,879.16, 5,356.22 and 2,387.76

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Solution

The fourth proportional to 3,879.16, 5,356.22 and 2,387.76 is: 3,296.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.16 : 5,356.22 = 2,387.76 : x
  2. Step 2: Convert to fraction form
    3,879.16/5,356.22 = 2,387.76/x
  3. Step 3: Cross multiply
    3,879.16x = 5,356.22 × 2,387.76
  4. Step 4: Simplify right side
    3,879.16x = 12,789,367.87
  5. Step 5: Solve for x
    x = 12,789,367.87/3,879.16
  6. Step 6: Final answer
    x = 3,296.94

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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.