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Finding the Fourth Proportional to 19,891.44, 29,819.34 and 8,197.20

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Solution

The fourth proportional to 19,891.44, 29,819.34 and 8,197.20 is: 12,288.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.44 : 29,819.34 = 8,197.20 : x
  2. Step 2: Convert to fraction form
    19,891.44/29,819.34 = 8,197.20/x
  3. Step 3: Cross multiply
    19,891.44x = 29,819.34 × 8,197.20
  4. Step 4: Simplify right side
    19,891.44x = 244,435,093.85
  5. Step 5: Solve for x
    x = 244,435,093.85/19,891.44
  6. Step 6: Final answer
    x = 12,288.46

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1.5x scale

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.