Home / 11,945.20-17,918.61-3,179.92

Finding the Fourth Proportional to 11,945.20, 17,918.61 and 3,179.92

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Solution

The fourth proportional to 11,945.20, 17,918.61 and 3,179.92 is: 4,770.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.20 : 17,918.61 = 3,179.92 : x
  2. Step 2: Convert to fraction form
    11,945.20/17,918.61 = 3,179.92/x
  3. Step 3: Cross multiply
    11,945.20x = 17,918.61 × 3,179.92
  4. Step 4: Simplify right side
    11,945.20x = 56,979,746.31
  5. Step 5: Solve for x
    x = 56,979,746.31/11,945.20
  6. Step 6: Final answer
    x = 4,770.10

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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.