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Finding the Fourth Proportional to 32,991.68, 45,505.68 and 20,408.96

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Solution

The fourth proportional to 32,991.68, 45,505.68 and 20,408.96 is: 28,150.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,991.68 : 45,505.68 = 20,408.96 : x
  2. Step 2: Convert to fraction form
    32,991.68/45,505.68 = 20,408.96/x
  3. Step 3: Cross multiply
    32,991.68x = 45,505.68 × 20,408.96
  4. Step 4: Simplify right side
    32,991.68x = 928,723,602.89
  5. Step 5: Solve for x
    x = 928,723,602.89/32,991.68
  6. Step 6: Final answer
    x = 28,150.24

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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.