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Finding the Fourth Proportional to 18,717.42, 28,067.92 and 7,022.44

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Solution

The fourth proportional to 18,717.42, 28,067.92 and 7,022.44 is: 10,530.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.42 : 28,067.92 = 7,022.44 : x
  2. Step 2: Convert to fraction form
    18,717.42/28,067.92 = 7,022.44/x
  3. Step 3: Cross multiply
    18,717.42x = 28,067.92 × 7,022.44
  4. Step 4: Simplify right side
    18,717.42x = 197,105,284.12
  5. Step 5: Solve for x
    x = 197,105,284.12/18,717.42
  6. Step 6: Final answer
    x = 10,530.58

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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.