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Finding the Fourth Proportional to 18,687.88, 25,759.20 and 13,644.11

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Solution

The fourth proportional to 18,687.88, 25,759.20 and 13,644.11 is: 18,806.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.88 : 25,759.20 = 13,644.11 : x
  2. Step 2: Convert to fraction form
    18,687.88/25,759.20 = 13,644.11/x
  3. Step 3: Cross multiply
    18,687.88x = 25,759.20 × 13,644.11
  4. Step 4: Simplify right side
    18,687.88x = 351,461,161.30
  5. Step 5: Solve for x
    x = 351,461,161.30/18,687.88
  6. Step 6: Final answer
    x = 18,806.91

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