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Finding the Fourth Proportional to 5,859.90, 8,787.69 and 2,161.17

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Solution

The fourth proportional to 5,859.90, 8,787.69 and 2,161.17 is: 3,240.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,859.90 : 8,787.69 = 2,161.17 : x
  2. Step 2: Convert to fraction form
    5,859.90/8,787.69 = 2,161.17/x
  3. Step 3: Cross multiply
    5,859.90x = 8,787.69 × 2,161.17
  4. Step 4: Simplify right side
    5,859.90x = 18,991,692.00
  5. Step 5: Solve for x
    x = 18,991,692.00/5,859.90
  6. Step 6: Final answer
    x = 3,240.96

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Why These Related Problems?

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