Home / 3,904.36-5,391.30-2,788.72

Finding the Fourth Proportional to 3,904.36, 5,391.30 and 2,788.72

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Solution

The fourth proportional to 3,904.36, 5,391.30 and 2,788.72 is: 3,850.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.36 : 5,391.30 = 2,788.72 : x
  2. Step 2: Convert to fraction form
    3,904.36/5,391.30 = 2,788.72/x
  3. Step 3: Cross multiply
    3,904.36x = 5,391.30 × 2,788.72
  4. Step 4: Simplify right side
    3,904.36x = 15,034,826.14
  5. Step 5: Solve for x
    x = 15,034,826.14/3,904.36
  6. Step 6: Final answer
    x = 3,850.78

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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.