Home / 3,930.58-5,815.66-3,919.78

Finding the Fourth Proportional to 3,930.58, 5,815.66 and 3,919.78

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Solution

The fourth proportional to 3,930.58, 5,815.66 and 3,919.78 is: 5,799.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.58 : 5,815.66 = 3,919.78 : x
  2. Step 2: Convert to fraction form
    3,930.58/5,815.66 = 3,919.78/x
  3. Step 3: Cross multiply
    3,930.58x = 5,815.66 × 3,919.78
  4. Step 4: Simplify right side
    3,930.58x = 22,796,107.75
  5. Step 5: Solve for x
    x = 22,796,107.75/3,930.58
  6. Step 6: Final answer
    x = 5,799.68

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.