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Finding the Fourth Proportional to 7,990.61, 11,974.97 and 5,070.97

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Solution

The fourth proportional to 7,990.61, 11,974.97 and 5,070.97 is: 7,599.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.61 : 11,974.97 = 5,070.97 : x
  2. Step 2: Convert to fraction form
    7,990.61/11,974.97 = 5,070.97/x
  3. Step 3: Cross multiply
    7,990.61x = 11,974.97 × 5,070.97
  4. Step 4: Simplify right side
    7,990.61x = 60,724,696.36
  5. Step 5: Solve for x
    x = 60,724,696.36/7,990.61
  6. Step 6: Final answer
    x = 7,599.50

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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.