Home / 12,787.21-19,181.92-3,904.54

Finding the Fourth Proportional to 12,787.21, 19,181.92 and 3,904.54

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Solution

The fourth proportional to 12,787.21, 19,181.92 and 3,904.54 is: 5,857.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.21 : 19,181.92 = 3,904.54 : x
  2. Step 2: Convert to fraction form
    12,787.21/19,181.92 = 3,904.54/x
  3. Step 3: Cross multiply
    12,787.21x = 19,181.92 × 3,904.54
  4. Step 4: Simplify right side
    12,787.21x = 74,896,573.92
  5. Step 5: Solve for x
    x = 74,896,573.92/12,787.21
  6. Step 6: Final answer
    x = 5,857.15

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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.