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Finding the Fourth Proportional to 20,350.96, 28,083.56 and 11,398.02

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Solution

The fourth proportional to 20,350.96, 28,083.56 and 11,398.02 is: 15,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.96 : 28,083.56 = 11,398.02 : x
  2. Step 2: Convert to fraction form
    20,350.96/28,083.56 = 11,398.02/x
  3. Step 3: Cross multiply
    20,350.96x = 28,083.56 × 11,398.02
  4. Step 4: Simplify right side
    20,350.96x = 320,096,978.55
  5. Step 5: Solve for x
    x = 320,096,978.55/20,350.96
  6. Step 6: Final answer
    x = 15,728.84

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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.