Home / 20,786.85-28,684.74-11,834.31

Finding the Fourth Proportional to 20,786.85, 28,684.74 and 11,834.31

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Solution

The fourth proportional to 20,786.85, 28,684.74 and 11,834.31 is: 16,330.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.85 : 28,684.74 = 11,834.31 : x
  2. Step 2: Convert to fraction form
    20,786.85/28,684.74 = 11,834.31/x
  3. Step 3: Cross multiply
    20,786.85x = 28,684.74 × 11,834.31
  4. Step 4: Simplify right side
    20,786.85x = 339,464,105.43
  5. Step 5: Solve for x
    x = 339,464,105.43/20,786.85
  6. Step 6: Final answer
    x = 16,330.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.