Home / 12,787.66-19,174.20-6,857.25

Finding the Fourth Proportional to 12,787.66, 19,174.20 and 6,857.25

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Solution

The fourth proportional to 12,787.66, 19,174.20 and 6,857.25 is: 10,281.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.66 : 19,174.20 = 6,857.25 : x
  2. Step 2: Convert to fraction form
    12,787.66/19,174.20 = 6,857.25/x
  3. Step 3: Cross multiply
    12,787.66x = 19,174.20 × 6,857.25
  4. Step 4: Simplify right side
    12,787.66x = 131,482,282.95
  5. Step 5: Solve for x
    x = 131,482,282.95/12,787.66
  6. Step 6: Final answer
    x = 10,281.97

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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.