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Finding the Fourth Proportional to 11,906.61, 16,431.04 and 6,601.42

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Solution

The fourth proportional to 11,906.61, 16,431.04 and 6,601.42 is: 9,109.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,906.61 : 16,431.04 = 6,601.42 : x
  2. Step 2: Convert to fraction form
    11,906.61/16,431.04 = 6,601.42/x
  3. Step 3: Cross multiply
    11,906.61x = 16,431.04 × 6,601.42
  4. Step 4: Simplify right side
    11,906.61x = 108,468,179.57
  5. Step 5: Solve for x
    x = 108,468,179.57/11,906.61
  6. Step 6: Final answer
    x = 9,109.92

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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.