Home / 3,990.38-5,508.09-2,418.47

Finding the Fourth Proportional to 3,990.38, 5,508.09 and 2,418.47

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Solution

The fourth proportional to 3,990.38, 5,508.09 and 2,418.47 is: 3,338.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.38 : 5,508.09 = 2,418.47 : x
  2. Step 2: Convert to fraction form
    3,990.38/5,508.09 = 2,418.47/x
  3. Step 3: Cross multiply
    3,990.38x = 5,508.09 × 2,418.47
  4. Step 4: Simplify right side
    3,990.38x = 13,321,143.54
  5. Step 5: Solve for x
    x = 13,321,143.54/3,990.38
  6. Step 6: Final answer
    x = 3,338.32

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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.