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Finding the Fourth Proportional to 7,811.94, 11,717.92 and 2,879.44

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Solution

The fourth proportional to 7,811.94, 11,717.92 and 2,879.44 is: 4,319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.94 : 11,717.92 = 2,879.44 : x
  2. Step 2: Convert to fraction form
    7,811.94/11,717.92 = 2,879.44/x
  3. Step 3: Cross multiply
    7,811.94x = 11,717.92 × 2,879.44
  4. Step 4: Simplify right side
    7,811.94x = 33,741,047.56
  5. Step 5: Solve for x
    x = 33,741,047.56/7,811.94
  6. Step 6: Final answer
    x = 4,319.16

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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.