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Finding the Fourth Proportional to 19,071.82, 28,610.79 and 5,921.11

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Solution

The fourth proportional to 19,071.82, 28,610.79 and 5,921.11 is: 8,882.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,071.82 : 28,610.79 = 5,921.11 : x
  2. Step 2: Convert to fraction form
    19,071.82/28,610.79 = 5,921.11/x
  3. Step 3: Cross multiply
    19,071.82x = 28,610.79 × 5,921.11
  4. Step 4: Simplify right side
    19,071.82x = 169,407,634.78
  5. Step 5: Solve for x
    x = 169,407,634.78/19,071.82
  6. Step 6: Final answer
    x = 8,882.62

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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.