Home / 3,992.15-5,509.26-2,223.78

Finding the Fourth Proportional to 3,992.15, 5,509.26 and 2,223.78

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Solution

The fourth proportional to 3,992.15, 5,509.26 and 2,223.78 is: 3,068.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.15 : 5,509.26 = 2,223.78 : x
  2. Step 2: Convert to fraction form
    3,992.15/5,509.26 = 2,223.78/x
  3. Step 3: Cross multiply
    3,992.15x = 5,509.26 × 2,223.78
  4. Step 4: Simplify right side
    3,992.15x = 12,251,382.20
  5. Step 5: Solve for x
    x = 12,251,382.20/3,992.15
  6. Step 6: Final answer
    x = 3,068.87

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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.