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Finding the Fourth Proportional to 28,775.66, 39,711.60 and 16,028.82

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Solution

The fourth proportional to 28,775.66, 39,711.60 and 16,028.82 is: 22,120.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.66 : 39,711.60 = 16,028.82 : x
  2. Step 2: Convert to fraction form
    28,775.66/39,711.60 = 16,028.82/x
  3. Step 3: Cross multiply
    28,775.66x = 39,711.60 × 16,028.82
  4. Step 4: Simplify right side
    28,775.66x = 636,530,088.31
  5. Step 5: Solve for x
    x = 636,530,088.31/28,775.66
  6. Step 6: Final answer
    x = 22,120.43

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