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Finding the Fourth Proportional to 19,591.65, 29,391.54 and 8,912.92

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Solution

The fourth proportional to 19,591.65, 29,391.54 and 8,912.92 is: 13,371.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,591.65 : 29,391.54 = 8,912.92 : x
  2. Step 2: Convert to fraction form
    19,591.65/29,391.54 = 8,912.92/x
  3. Step 3: Cross multiply
    19,591.65x = 29,391.54 × 8,912.92
  4. Step 4: Simplify right side
    19,591.65x = 261,964,400.13
  5. Step 5: Solve for x
    x = 261,964,400.13/19,591.65
  6. Step 6: Final answer
    x = 13,371.23

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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.