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Finding the Fourth Proportional to 20,459.96, 30,690.60 and 5,669.02

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Solution

The fourth proportional to 20,459.96, 30,690.60 and 5,669.02 is: 8,503.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.96 : 30,690.60 = 5,669.02 : x
  2. Step 2: Convert to fraction form
    20,459.96/30,690.60 = 5,669.02/x
  3. Step 3: Cross multiply
    20,459.96x = 30,690.60 × 5,669.02
  4. Step 4: Simplify right side
    20,459.96x = 173,985,625.21
  5. Step 5: Solve for x
    x = 173,985,625.21/20,459.96
  6. Step 6: Final answer
    x = 8,503.71

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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.