Home / 3,940.13-5,438.45-2,261.68

Finding the Fourth Proportional to 3,940.13, 5,438.45 and 2,261.68

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Solution

The fourth proportional to 3,940.13, 5,438.45 and 2,261.68 is: 3,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.13 : 5,438.45 = 2,261.68 : x
  2. Step 2: Convert to fraction form
    3,940.13/5,438.45 = 2,261.68/x
  3. Step 3: Cross multiply
    3,940.13x = 5,438.45 × 2,261.68
  4. Step 4: Simplify right side
    3,940.13x = 12,300,033.60
  5. Step 5: Solve for x
    x = 12,300,033.60/3,940.13
  6. Step 6: Final answer
    x = 3,121.73

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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.