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Finding the Fourth Proportional to 6,231.60, 8,589.49 and 5,421.99

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Solution

The fourth proportional to 6,231.60, 8,589.49 and 5,421.99 is: 7,473.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,231.60 : 8,589.49 = 5,421.99 : x
  2. Step 2: Convert to fraction form
    6,231.60/8,589.49 = 5,421.99/x
  3. Step 3: Cross multiply
    6,231.60x = 8,589.49 × 5,421.99
  4. Step 4: Simplify right side
    6,231.60x = 46,572,129.72
  5. Step 5: Solve for x
    x = 46,572,129.72/6,231.60
  6. Step 6: Final answer
    x = 7,473.54

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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.