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Finding the Fourth Proportional to 19,009.99, 28,512.55 and 7,914.61

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Solution

The fourth proportional to 19,009.99, 28,512.55 and 7,914.61 is: 11,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.99 : 28,512.55 = 7,914.61 : x
  2. Step 2: Convert to fraction form
    19,009.99/28,512.55 = 7,914.61/x
  3. Step 3: Cross multiply
    19,009.99x = 28,512.55 × 7,914.61
  4. Step 4: Simplify right side
    19,009.99x = 225,665,713.36
  5. Step 5: Solve for x
    x = 225,665,713.36/19,009.99
  6. Step 6: Final answer
    x = 11,870.90

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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.