Home / 20,857.88-31,290.24-6,813.83

Finding the Fourth Proportional to 20,857.88, 31,290.24 and 6,813.83

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Solution

The fourth proportional to 20,857.88, 31,290.24 and 6,813.83 is: 10,221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.88 : 31,290.24 = 6,813.83 : x
  2. Step 2: Convert to fraction form
    20,857.88/31,290.24 = 6,813.83/x
  3. Step 3: Cross multiply
    20,857.88x = 31,290.24 × 6,813.83
  4. Step 4: Simplify right side
    20,857.88x = 213,206,454.24
  5. Step 5: Solve for x
    x = 213,206,454.24/20,857.88
  6. Step 6: Final answer
    x = 10,221.86

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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.