Home / 3,945.85-5,445.36-2,177.42

Finding the Fourth Proportional to 3,945.85, 5,445.36 and 2,177.42

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Solution

The fourth proportional to 3,945.85, 5,445.36 and 2,177.42 is: 3,004.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.85 : 5,445.36 = 2,177.42 : x
  2. Step 2: Convert to fraction form
    3,945.85/5,445.36 = 2,177.42/x
  3. Step 3: Cross multiply
    3,945.85x = 5,445.36 × 2,177.42
  4. Step 4: Simplify right side
    3,945.85x = 11,856,808.54
  5. Step 5: Solve for x
    x = 11,856,808.54/3,945.85
  6. Step 6: Final answer
    x = 3,004.88

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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.