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Finding the Fourth Proportional to 12,787.16, 19,169.20 and 5,392.07

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Solution

The fourth proportional to 12,787.16, 19,169.20 and 5,392.07 is: 8,083.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.16 : 19,169.20 = 5,392.07 : x
  2. Step 2: Convert to fraction form
    12,787.16/19,169.20 = 5,392.07/x
  3. Step 3: Cross multiply
    12,787.16x = 19,169.20 × 5,392.07
  4. Step 4: Simplify right side
    12,787.16x = 103,361,545.44
  5. Step 5: Solve for x
    x = 103,361,545.44/12,787.16
  6. Step 6: Final answer
    x = 8,083.23

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1.5x scale

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.