Home / 7,979.34-11,974.47-2,785.21

Finding the Fourth Proportional to 7,979.34, 11,974.47 and 2,785.21

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Solution

The fourth proportional to 7,979.34, 11,974.47 and 2,785.21 is: 4,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.34 : 11,974.47 = 2,785.21 : x
  2. Step 2: Convert to fraction form
    7,979.34/11,974.47 = 2,785.21/x
  3. Step 3: Cross multiply
    7,979.34x = 11,974.47 × 2,785.21
  4. Step 4: Simplify right side
    7,979.34x = 33,351,413.59
  5. Step 5: Solve for x
    x = 33,351,413.59/7,979.34
  6. Step 6: Final answer
    x = 4,179.72

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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.