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Finding the Fourth Proportional to 11,129.74, 16,694.79 and 5,286.94

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Solution

The fourth proportional to 11,129.74, 16,694.79 and 5,286.94 is: 7,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.74 : 16,694.79 = 5,286.94 : x
  2. Step 2: Convert to fraction form
    11,129.74/16,694.79 = 5,286.94/x
  3. Step 3: Cross multiply
    11,129.74x = 16,694.79 × 5,286.94
  4. Step 4: Simplify right side
    11,129.74x = 88,264,353.04
  5. Step 5: Solve for x
    x = 88,264,353.04/11,129.74
  6. Step 6: Final answer
    x = 7,930.50

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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.