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Finding the Fourth Proportional to 16,991.91, 25,479.93 and 6,463.89

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Solution

The fourth proportional to 16,991.91, 25,479.93 and 6,463.89 is: 9,692.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.91 : 25,479.93 = 6,463.89 : x
  2. Step 2: Convert to fraction form
    16,991.91/25,479.93 = 6,463.89/x
  3. Step 3: Cross multiply
    16,991.91x = 25,479.93 × 6,463.89
  4. Step 4: Simplify right side
    16,991.91x = 164,699,464.73
  5. Step 5: Solve for x
    x = 164,699,464.73/16,991.91
  6. Step 6: Final answer
    x = 9,692.82

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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.