Home / 3,945.71-5,445.41-2,177.70

Finding the Fourth Proportional to 3,945.71, 5,445.41 and 2,177.70

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Solution

The fourth proportional to 3,945.71, 5,445.41 and 2,177.70 is: 3,005.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.71 : 5,445.41 = 2,177.70 : x
  2. Step 2: Convert to fraction form
    3,945.71/5,445.41 = 2,177.70/x
  3. Step 3: Cross multiply
    3,945.71x = 5,445.41 × 2,177.70
  4. Step 4: Simplify right side
    3,945.71x = 11,858,469.36
  5. Step 5: Solve for x
    x = 11,858,469.36/3,945.71
  6. Step 6: Final answer
    x = 3,005.41

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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.