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Finding the Fourth Proportional to 18,231.88, 25,183.20 and 13,957

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Solution

The fourth proportional to 18,231.88, 25,183.20 and 13,957 is: 19,278.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,231.88 : 25,183.20 = 13,957 : x
  2. Step 2: Convert to fraction form
    18,231.88/25,183.20 = 13,957/x
  3. Step 3: Cross multiply
    18,231.88x = 25,183.20 × 13,957
  4. Step 4: Simplify right side
    18,231.88x = 351,481,922.40
  5. Step 5: Solve for x
    x = 351,481,922.40/18,231.88
  6. Step 6: Final answer
    x = 19,278.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.