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Finding the Fourth Proportional to 28,729.80, 43,078.44 and 11,179.44

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Solution

The fourth proportional to 28,729.80, 43,078.44 and 11,179.44 is: 16,762.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729.80 : 43,078.44 = 11,179.44 : x
  2. Step 2: Convert to fraction form
    28,729.80/43,078.44 = 11,179.44/x
  3. Step 3: Cross multiply
    28,729.80x = 43,078.44 × 11,179.44
  4. Step 4: Simplify right side
    28,729.80x = 481,592,835.27
  5. Step 5: Solve for x
    x = 481,592,835.27/28,729.80
  6. Step 6: Final answer
    x = 16,762.83

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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.