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Finding the Fourth Proportional to 16,819.80, 25,229.70 and 11,789.70

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Solution

The fourth proportional to 16,819.80, 25,229.70 and 11,789.70 is: 17,684.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,819.80 : 25,229.70 = 11,789.70 : x
  2. Step 2: Convert to fraction form
    16,819.80/25,229.70 = 11,789.70/x
  3. Step 3: Cross multiply
    16,819.80x = 25,229.70 × 11,789.70
  4. Step 4: Simplify right side
    16,819.80x = 297,450,594.09
  5. Step 5: Solve for x
    x = 297,450,594.09/16,819.80
  6. Step 6: Final answer
    x = 17,684.55

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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.