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Finding the Fourth Proportional to 12,179.73, 16,808.81 and 6,872.61

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Solution

The fourth proportional to 12,179.73, 16,808.81 and 6,872.61 is: 9,484.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.73 : 16,808.81 = 6,872.61 : x
  2. Step 2: Convert to fraction form
    12,179.73/16,808.81 = 6,872.61/x
  3. Step 3: Cross multiply
    12,179.73x = 16,808.81 × 6,872.61
  4. Step 4: Simplify right side
    12,179.73x = 115,520,361.33
  5. Step 5: Solve for x
    x = 115,520,361.33/12,179.73
  6. Step 6: Final answer
    x = 9,484.64

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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.