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Finding the Fourth Proportional to 13,745.61, 20,623.11 and 5,847.81

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Solution

The fourth proportional to 13,745.61, 20,623.11 and 5,847.81 is: 8,773.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.61 : 20,623.11 = 5,847.81 : x
  2. Step 2: Convert to fraction form
    13,745.61/20,623.11 = 5,847.81/x
  3. Step 3: Cross multiply
    13,745.61x = 20,623.11 × 5,847.81
  4. Step 4: Simplify right side
    13,745.61x = 120,600,028.89
  5. Step 5: Solve for x
    x = 120,600,028.89/13,745.61
  6. Step 6: Final answer
    x = 8,773.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.