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Finding the Fourth Proportional to 11,287.68, 16,942.46 and 5,448.40

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Solution

The fourth proportional to 11,287.68, 16,942.46 and 5,448.40 is: 8,177.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.68 : 16,942.46 = 5,448.40 : x
  2. Step 2: Convert to fraction form
    11,287.68/16,942.46 = 5,448.40/x
  3. Step 3: Cross multiply
    11,287.68x = 16,942.46 × 5,448.40
  4. Step 4: Simplify right side
    11,287.68x = 92,309,299.06
  5. Step 5: Solve for x
    x = 92,309,299.06/11,287.68
  6. Step 6: Final answer
    x = 8,177.88

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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.