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Finding the Fourth Proportional to 19,791.32, 29,687.90 and 11,019.62

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Solution

The fourth proportional to 19,791.32, 29,687.90 and 11,019.62 is: 16,529.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.32 : 29,687.90 = 11,019.62 : x
  2. Step 2: Convert to fraction form
    19,791.32/29,687.90 = 11,019.62/x
  3. Step 3: Cross multiply
    19,791.32x = 29,687.90 × 11,019.62
  4. Step 4: Simplify right side
    19,791.32x = 327,149,395.72
  5. Step 5: Solve for x
    x = 327,149,395.72/19,791.32
  6. Step 6: Final answer
    x = 16,529.95

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1.5x scale

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.