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Finding the Fourth Proportional to 8,745.16, 13,120.18 and 3,815.24

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Solution

The fourth proportional to 8,745.16, 13,120.18 and 3,815.24 is: 5,723.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,745.16 : 13,120.18 = 3,815.24 : x
  2. Step 2: Convert to fraction form
    8,745.16/13,120.18 = 3,815.24/x
  3. Step 3: Cross multiply
    8,745.16x = 13,120.18 × 3,815.24
  4. Step 4: Simplify right side
    8,745.16x = 50,056,635.54
  5. Step 5: Solve for x
    x = 50,056,635.54/8,745.16
  6. Step 6: Final answer
    x = 5,723.92

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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.