Home / 20,711.99-31,067.85-12,394.33

Finding the Fourth Proportional to 20,711.99, 31,067.85 and 12,394.33

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Solution

The fourth proportional to 20,711.99, 31,067.85 and 12,394.33 is: 18,591.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.99 : 31,067.85 = 12,394.33 : x
  2. Step 2: Convert to fraction form
    20,711.99/31,067.85 = 12,394.33/x
  3. Step 3: Cross multiply
    20,711.99x = 31,067.85 × 12,394.33
  4. Step 4: Simplify right side
    20,711.99x = 385,065,185.29
  5. Step 5: Solve for x
    x = 385,065,185.29/20,711.99
  6. Step 6: Final answer
    x = 18,591.41

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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.