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Finding the Fourth Proportional to 18,708.52, 28,067.24 and 7,021.84

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Solution

The fourth proportional to 18,708.52, 28,067.24 and 7,021.84 is: 10,534.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.52 : 28,067.24 = 7,021.84 : x
  2. Step 2: Convert to fraction form
    18,708.52/28,067.24 = 7,021.84/x
  3. Step 3: Cross multiply
    18,708.52x = 28,067.24 × 7,021.84
  4. Step 4: Simplify right side
    18,708.52x = 197,083,668.52
  5. Step 5: Solve for x
    x = 197,083,668.52/18,708.52
  6. Step 6: Final answer
    x = 10,534.43

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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.