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Finding the Fourth Proportional to 18,711.46, 28,067.28 and 4,860.46

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Solution

The fourth proportional to 18,711.46, 28,067.28 and 4,860.46 is: 7,290.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.46 : 28,067.28 = 4,860.46 : x
  2. Step 2: Convert to fraction form
    18,711.46/28,067.28 = 4,860.46/x
  3. Step 3: Cross multiply
    18,711.46x = 28,067.28 × 4,860.46
  4. Step 4: Simplify right side
    18,711.46x = 136,419,891.75
  5. Step 5: Solve for x
    x = 136,419,891.75/18,711.46
  6. Step 6: Final answer
    x = 7,290.71

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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.