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Finding the Fourth Proportional to 15,912.67, 23,859.20 and 5,381.70

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Solution

The fourth proportional to 15,912.67, 23,859.20 and 5,381.70 is: 8,069.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.67 : 23,859.20 = 5,381.70 : x
  2. Step 2: Convert to fraction form
    15,912.67/23,859.20 = 5,381.70/x
  3. Step 3: Cross multiply
    15,912.67x = 23,859.20 × 5,381.70
  4. Step 4: Simplify right side
    15,912.67x = 128,403,056.64
  5. Step 5: Solve for x
    x = 128,403,056.64/15,912.67
  6. Step 6: Final answer
    x = 8,069.23

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.