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Finding the Fourth Proportional to 18,372.45, 25,353.98 and 10,415.18

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Solution

The fourth proportional to 18,372.45, 25,353.98 and 10,415.18 is: 14,372.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.45 : 25,353.98 = 10,415.18 : x
  2. Step 2: Convert to fraction form
    18,372.45/25,353.98 = 10,415.18/x
  3. Step 3: Cross multiply
    18,372.45x = 25,353.98 × 10,415.18
  4. Step 4: Simplify right side
    18,372.45x = 264,066,315.78
  5. Step 5: Solve for x
    x = 264,066,315.78/18,372.45
  6. Step 6: Final answer
    x = 14,372.95

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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.