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Finding the Fourth Proportional to 18,408.68, 25,405.00 and 10,859.44

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Solution

The fourth proportional to 18,408.68, 25,405.00 and 10,859.44 is: 14,986.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,408.68 : 25,405.00 = 10,859.44 : x
  2. Step 2: Convert to fraction form
    18,408.68/25,405.00 = 10,859.44/x
  3. Step 3: Cross multiply
    18,408.68x = 25,405.00 × 10,859.44
  4. Step 4: Simplify right side
    18,408.68x = 275,883,982.54
  5. Step 5: Solve for x
    x = 275,883,982.54/18,408.68
  6. Step 6: Final answer
    x = 14,986.62

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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.