Home / 3,945.76-5,445.30-2,177.56

Finding the Fourth Proportional to 3,945.76, 5,445.30 and 2,177.56

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Solution

The fourth proportional to 3,945.76, 5,445.30 and 2,177.56 is: 3,005.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.76 : 5,445.30 = 2,177.56 : x
  2. Step 2: Convert to fraction form
    3,945.76/5,445.30 = 2,177.56/x
  3. Step 3: Cross multiply
    3,945.76x = 5,445.30 × 2,177.56
  4. Step 4: Simplify right side
    3,945.76x = 11,857,467.47
  5. Step 5: Solve for x
    x = 11,857,467.47/3,945.76
  6. Step 6: Final answer
    x = 3,005.12

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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.