Home / 3,945.78-5,445.12-2,177.34

Finding the Fourth Proportional to 3,945.78, 5,445.12 and 2,177.34

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Solution

The fourth proportional to 3,945.78, 5,445.12 and 2,177.34 is: 3,004.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.78 : 5,445.12 = 2,177.34 : x
  2. Step 2: Convert to fraction form
    3,945.78/5,445.12 = 2,177.34/x
  3. Step 3: Cross multiply
    3,945.78x = 5,445.12 × 2,177.34
  4. Step 4: Simplify right side
    3,945.78x = 11,855,877.58
  5. Step 5: Solve for x
    x = 11,855,877.58/3,945.78
  6. Step 6: Final answer
    x = 3,004.70

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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.