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Finding the Fourth Proportional to 28,296.99, 42,449.88 and 8,570.85

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Solution

The fourth proportional to 28,296.99, 42,449.88 and 8,570.85 is: 12,857.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,296.99 : 42,449.88 = 8,570.85 : x
  2. Step 2: Convert to fraction form
    28,296.99/42,449.88 = 8,570.85/x
  3. Step 3: Cross multiply
    28,296.99x = 42,449.88 × 8,570.85
  4. Step 4: Simplify right side
    28,296.99x = 363,831,554.00
  5. Step 5: Solve for x
    x = 363,831,554.00/28,296.99
  6. Step 6: Final answer
    x = 12,857.61

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.