Home / 3,940.38-5,438.88-2,447.55

Finding the Fourth Proportional to 3,940.38, 5,438.88 and 2,447.55

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Solution

The fourth proportional to 3,940.38, 5,438.88 and 2,447.55 is: 3,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.38 : 5,438.88 = 2,447.55 : x
  2. Step 2: Convert to fraction form
    3,940.38/5,438.88 = 2,447.55/x
  3. Step 3: Cross multiply
    3,940.38x = 5,438.88 × 2,447.55
  4. Step 4: Simplify right side
    3,940.38x = 13,311,930.74
  5. Step 5: Solve for x
    x = 13,311,930.74/3,940.38
  6. Step 6: Final answer
    x = 3,378.34

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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.