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Finding the Fourth Proportional to 12,375.82, 17,078.79 and 6,787.18

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Solution

The fourth proportional to 12,375.82, 17,078.79 and 6,787.18 is: 9,366.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.82 : 17,078.79 = 6,787.18 : x
  2. Step 2: Convert to fraction form
    12,375.82/17,078.79 = 6,787.18/x
  3. Step 3: Cross multiply
    12,375.82x = 17,078.79 × 6,787.18
  4. Step 4: Simplify right side
    12,375.82x = 115,916,821.91
  5. Step 5: Solve for x
    x = 115,916,821.91/12,375.82
  6. Step 6: Final answer
    x = 9,366.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.