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Finding the Fourth Proportional to 13,608.60, 20,410.50 and 3,745.48

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Solution

The fourth proportional to 13,608.60, 20,410.50 and 3,745.48 is: 5,617.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.60 : 20,410.50 = 3,745.48 : x
  2. Step 2: Convert to fraction form
    13,608.60/20,410.50 = 3,745.48/x
  3. Step 3: Cross multiply
    13,608.60x = 20,410.50 × 3,745.48
  4. Step 4: Simplify right side
    13,608.60x = 76,447,119.54
  5. Step 5: Solve for x
    x = 76,447,119.54/13,608.60
  6. Step 6: Final answer
    x = 5,617.56

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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.