Home / 3,945.80-5,445.07-2,177.41

Finding the Fourth Proportional to 3,945.80, 5,445.07 and 2,177.41

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Solution

The fourth proportional to 3,945.80, 5,445.07 and 2,177.41 is: 3,004.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.80 : 5,445.07 = 2,177.41 : x
  2. Step 2: Convert to fraction form
    3,945.80/5,445.07 = 2,177.41/x
  3. Step 3: Cross multiply
    3,945.80x = 5,445.07 × 2,177.41
  4. Step 4: Simplify right side
    3,945.80x = 11,856,149.87
  5. Step 5: Solve for x
    x = 11,856,149.87/3,945.80
  6. Step 6: Final answer
    x = 3,004.75

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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.