Home / 20,729.14-31,067.68-8,868.98

Finding the Fourth Proportional to 20,729.14, 31,067.68 and 8,868.98

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Solution

The fourth proportional to 20,729.14, 31,067.68 and 8,868.98 is: 13,292.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.14 : 31,067.68 = 8,868.98 : x
  2. Step 2: Convert to fraction form
    20,729.14/31,067.68 = 8,868.98/x
  3. Step 3: Cross multiply
    20,729.14x = 31,067.68 × 8,868.98
  4. Step 4: Simplify right side
    20,729.14x = 275,538,632.57
  5. Step 5: Solve for x
    x = 275,538,632.57/20,729.14
  6. Step 6: Final answer
    x = 13,292.33

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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.