Home / 8,163.20-12,231.60-7,385.60

Finding the Fourth Proportional to 8,163.20, 12,231.60 and 7,385.60

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Solution

The fourth proportional to 8,163.20, 12,231.60 and 7,385.60 is: 11,066.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,163.20 : 12,231.60 = 7,385.60 : x
  2. Step 2: Convert to fraction form
    8,163.20/12,231.60 = 7,385.60/x
  3. Step 3: Cross multiply
    8,163.20x = 12,231.60 × 7,385.60
  4. Step 4: Simplify right side
    8,163.20x = 90,337,704.96
  5. Step 5: Solve for x
    x = 90,337,704.96/8,163.20
  6. Step 6: Final answer
    x = 11,066.46

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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.