Home / 20,786.21-28,683.89-11,833.69

Finding the Fourth Proportional to 20,786.21, 28,683.89 and 11,833.69

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Solution

The fourth proportional to 20,786.21, 28,683.89 and 11,833.69 is: 16,329.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.21 : 28,683.89 = 11,833.69 : x
  2. Step 2: Convert to fraction form
    20,786.21/28,683.89 = 11,833.69/x
  3. Step 3: Cross multiply
    20,786.21x = 28,683.89 × 11,833.69
  4. Step 4: Simplify right side
    20,786.21x = 339,436,118.83
  5. Step 5: Solve for x
    x = 339,436,118.83/20,786.21
  6. Step 6: Final answer
    x = 16,329.87

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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.