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Finding the Fourth Proportional to 19,603.54, 29,405.25 and 7,916.62

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Solution

The fourth proportional to 19,603.54, 29,405.25 and 7,916.62 is: 11,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.54 : 29,405.25 = 7,916.62 : x
  2. Step 2: Convert to fraction form
    19,603.54/29,405.25 = 7,916.62/x
  3. Step 3: Cross multiply
    19,603.54x = 29,405.25 × 7,916.62
  4. Step 4: Simplify right side
    19,603.54x = 232,790,190.26
  5. Step 5: Solve for x
    x = 232,790,190.26/19,603.54
  6. Step 6: Final answer
    x = 11,874.91

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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.