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Finding the Fourth Proportional to 15,068.22, 20,791.94 and 8,692.31

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Solution

The fourth proportional to 15,068.22, 20,791.94 and 8,692.31 is: 11,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,068.22 : 20,791.94 = 8,692.31 : x
  2. Step 2: Convert to fraction form
    15,068.22/20,791.94 = 8,692.31/x
  3. Step 3: Cross multiply
    15,068.22x = 20,791.94 × 8,692.31
  4. Step 4: Simplify right side
    15,068.22x = 180,729,840.56
  5. Step 5: Solve for x
    x = 180,729,840.56/15,068.22
  6. Step 6: Final answer
    x = 11,994.11

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Why These Related Problems?

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