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Finding the Fourth Proportional to 13,231.20, 19,825.20 and 11,287.20

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Solution

The fourth proportional to 13,231.20, 19,825.20 and 11,287.20 is: 16,912.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,231.20 : 19,825.20 = 11,287.20 : x
  2. Step 2: Convert to fraction form
    13,231.20/19,825.20 = 11,287.20/x
  3. Step 3: Cross multiply
    13,231.20x = 19,825.20 × 11,287.20
  4. Step 4: Simplify right side
    13,231.20x = 223,770,997.44
  5. Step 5: Solve for x
    x = 223,770,997.44/13,231.20
  6. Step 6: Final answer
    x = 16,912.37

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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.