Home / 3,879.69-5,356.49-2,555.64

Finding the Fourth Proportional to 3,879.69, 5,356.49 and 2,555.64

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Solution

The fourth proportional to 3,879.69, 5,356.49 and 2,555.64 is: 3,528.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.69 : 5,356.49 = 2,555.64 : x
  2. Step 2: Convert to fraction form
    3,879.69/5,356.49 = 2,555.64/x
  3. Step 3: Cross multiply
    3,879.69x = 5,356.49 × 2,555.64
  4. Step 4: Simplify right side
    3,879.69x = 13,689,260.10
  5. Step 5: Solve for x
    x = 13,689,260.10/3,879.69
  6. Step 6: Final answer
    x = 3,528.44

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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.