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Finding the Fourth Proportional to 28,819.70, 43,234.01 and 12,179.80

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Solution

The fourth proportional to 28,819.70, 43,234.01 and 12,179.80 is: 18,271.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,819.70 : 43,234.01 = 12,179.80 : x
  2. Step 2: Convert to fraction form
    28,819.70/43,234.01 = 12,179.80/x
  3. Step 3: Cross multiply
    28,819.70x = 43,234.01 × 12,179.80
  4. Step 4: Simplify right side
    28,819.70x = 526,581,517.36
  5. Step 5: Solve for x
    x = 526,581,517.36/28,819.70
  6. Step 6: Final answer
    x = 18,271.59

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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.