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Finding the Fourth Proportional to 20,166.57, 30,245.85 and 19,166.40

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Solution

The fourth proportional to 20,166.57, 30,245.85 and 19,166.40 is: 28,745.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,166.57 : 30,245.85 = 19,166.40 : x
  2. Step 2: Convert to fraction form
    20,166.57/30,245.85 = 19,166.40/x
  3. Step 3: Cross multiply
    20,166.57x = 30,245.85 × 19,166.40
  4. Step 4: Simplify right side
    20,166.57x = 579,704,059.44
  5. Step 5: Solve for x
    x = 579,704,059.44/20,166.57
  6. Step 6: Final answer
    x = 28,745.79

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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.