Home / 7,984.66-11,979.36-4,091.80

Finding the Fourth Proportional to 7,984.66, 11,979.36 and 4,091.80

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Solution

The fourth proportional to 7,984.66, 11,979.36 and 4,091.80 is: 6,138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,984.66 : 11,979.36 = 4,091.80 : x
  2. Step 2: Convert to fraction form
    7,984.66/11,979.36 = 4,091.80/x
  3. Step 3: Cross multiply
    7,984.66x = 11,979.36 × 4,091.80
  4. Step 4: Simplify right side
    7,984.66x = 49,017,145.25
  5. Step 5: Solve for x
    x = 49,017,145.25/7,984.66
  6. Step 6: Final answer
    x = 6,138.91

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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.