Home / 20,857.84-31,290.17-6,813.79

Finding the Fourth Proportional to 20,857.84, 31,290.17 and 6,813.79

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Solution

The fourth proportional to 20,857.84, 31,290.17 and 6,813.79 is: 10,221.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.84 : 31,290.17 = 6,813.79 : x
  2. Step 2: Convert to fraction form
    20,857.84/31,290.17 = 6,813.79/x
  3. Step 3: Cross multiply
    20,857.84x = 31,290.17 × 6,813.79
  4. Step 4: Simplify right side
    20,857.84x = 213,204,535.15
  5. Step 5: Solve for x
    x = 213,204,535.15/20,857.84
  6. Step 6: Final answer
    x = 10,221.79

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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.