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Finding the Fourth Proportional to 20,559.22, 30,832.45 and 7,409.88

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Solution

The fourth proportional to 20,559.22, 30,832.45 and 7,409.88 is: 11,112.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.22 : 30,832.45 = 7,409.88 : x
  2. Step 2: Convert to fraction form
    20,559.22/30,832.45 = 7,409.88/x
  3. Step 3: Cross multiply
    20,559.22x = 30,832.45 × 7,409.88
  4. Step 4: Simplify right side
    20,559.22x = 228,464,736.08
  5. Step 5: Solve for x
    x = 228,464,736.08/20,559.22
  6. Step 6: Final answer
    x = 11,112.52

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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.