Home / 3,948.73-5,455.78-3,115.77

Finding the Fourth Proportional to 3,948.73, 5,455.78 and 3,115.77

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Solution

The fourth proportional to 3,948.73, 5,455.78 and 3,115.77 is: 4,304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.73 : 5,455.78 = 3,115.77 : x
  2. Step 2: Convert to fraction form
    3,948.73/5,455.78 = 3,115.77/x
  3. Step 3: Cross multiply
    3,948.73x = 5,455.78 × 3,115.77
  4. Step 4: Simplify right side
    3,948.73x = 16,998,955.65
  5. Step 5: Solve for x
    x = 16,998,955.65/3,948.73
  6. Step 6: Final answer
    x = 4,304.92

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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.