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Finding the Fourth Proportional to 18,231.22, 27,355.18 and 8,238.64

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Solution

The fourth proportional to 18,231.22, 27,355.18 and 8,238.64 is: 12,361.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,231.22 : 27,355.18 = 8,238.64 : x
  2. Step 2: Convert to fraction form
    18,231.22/27,355.18 = 8,238.64/x
  3. Step 3: Cross multiply
    18,231.22x = 27,355.18 × 8,238.64
  4. Step 4: Simplify right side
    18,231.22x = 225,369,480.16
  5. Step 5: Solve for x
    x = 225,369,480.16/18,231.22
  6. Step 6: Final answer
    x = 12,361.73

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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.