Home / 11,979.20-17,956.48-4,182.72

Finding the Fourth Proportional to 11,979.20, 17,956.48 and 4,182.72

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Solution

The fourth proportional to 11,979.20, 17,956.48 and 4,182.72 is: 6,269.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.20 : 17,956.48 = 4,182.72 : x
  2. Step 2: Convert to fraction form
    11,979.20/17,956.48 = 4,182.72/x
  3. Step 3: Cross multiply
    11,979.20x = 17,956.48 × 4,182.72
  4. Step 4: Simplify right side
    11,979.20x = 75,106,928.03
  5. Step 5: Solve for x
    x = 75,106,928.03/11,979.20
  6. Step 6: Final answer
    x = 6,269.78

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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.