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Finding the Fourth Proportional to 8,691.12, 13,035.60 and 2,847.60

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Solution

The fourth proportional to 8,691.12, 13,035.60 and 2,847.60 is: 4,271.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.12 : 13,035.60 = 2,847.60 : x
  2. Step 2: Convert to fraction form
    8,691.12/13,035.60 = 2,847.60/x
  3. Step 3: Cross multiply
    8,691.12x = 13,035.60 × 2,847.60
  4. Step 4: Simplify right side
    8,691.12x = 37,120,174.56
  5. Step 5: Solve for x
    x = 37,120,174.56/8,691.12
  6. Step 6: Final answer
    x = 4,271.05

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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.