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Finding the Fourth Proportional to 11,568.80, 17,314.80 and 8,112.80

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Solution

The fourth proportional to 11,568.80, 17,314.80 and 8,112.80 is: 12,142.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,568.80 : 17,314.80 = 8,112.80 : x
  2. Step 2: Convert to fraction form
    11,568.80/17,314.80 = 8,112.80/x
  3. Step 3: Cross multiply
    11,568.80x = 17,314.80 × 8,112.80
  4. Step 4: Simplify right side
    11,568.80x = 140,471,509.44
  5. Step 5: Solve for x
    x = 140,471,509.44/11,568.80
  6. Step 6: Final answer
    x = 12,142.27

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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.