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Finding the Fourth Proportional to 28,811.28, 43,218.63 and 8,034.78

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Solution

The fourth proportional to 28,811.28, 43,218.63 and 8,034.78 is: 12,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,811.28 : 43,218.63 = 8,034.78 : x
  2. Step 2: Convert to fraction form
    28,811.28/43,218.63 = 8,034.78/x
  3. Step 3: Cross multiply
    28,811.28x = 43,218.63 × 8,034.78
  4. Step 4: Simplify right side
    28,811.28x = 347,252,183.95
  5. Step 5: Solve for x
    x = 347,252,183.95/28,811.28
  6. Step 6: Final answer
    x = 12,052.65

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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.