Home / 11,945.76-17,921.40-3,625.80

Finding the Fourth Proportional to 11,945.76, 17,921.40 and 3,625.80

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Solution

The fourth proportional to 11,945.76, 17,921.40 and 3,625.80 is: 5,439.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.76 : 17,921.40 = 3,625.80 : x
  2. Step 2: Convert to fraction form
    11,945.76/17,921.40 = 3,625.80/x
  3. Step 3: Cross multiply
    11,945.76x = 17,921.40 × 3,625.80
  4. Step 4: Simplify right side
    11,945.76x = 64,979,412.12
  5. Step 5: Solve for x
    x = 64,979,412.12/11,945.76
  6. Step 6: Final answer
    x = 5,439.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.