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Finding the Fourth Proportional to 28,764.76, 39,692.54 and 16,825.76

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Solution

The fourth proportional to 28,764.76, 39,692.54 and 16,825.76 is: 23,217.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,764.76 : 39,692.54 = 16,825.76 : x
  2. Step 2: Convert to fraction form
    28,764.76/39,692.54 = 16,825.76/x
  3. Step 3: Cross multiply
    28,764.76x = 39,692.54 × 16,825.76
  4. Step 4: Simplify right side
    28,764.76x = 667,857,067.70
  5. Step 5: Solve for x
    x = 667,857,067.70/28,764.76
  6. Step 6: Final answer
    x = 23,217.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.