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Finding the Fourth Proportional to 19,863.72, 29,787.42 and 7,384.60

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Solution

The fourth proportional to 19,863.72, 29,787.42 and 7,384.60 is: 11,073.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,863.72 : 29,787.42 = 7,384.60 : x
  2. Step 2: Convert to fraction form
    19,863.72/29,787.42 = 7,384.60/x
  3. Step 3: Cross multiply
    19,863.72x = 29,787.42 × 7,384.60
  4. Step 4: Simplify right side
    19,863.72x = 219,968,181.73
  5. Step 5: Solve for x
    x = 219,968,181.73/19,863.72
  6. Step 6: Final answer
    x = 11,073.87

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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.