Home / 20,785.42-28,680.55-11,833.09

Finding the Fourth Proportional to 20,785.42, 28,680.55 and 11,833.09

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Solution

The fourth proportional to 20,785.42, 28,680.55 and 11,833.09 is: 16,327.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.42 : 28,680.55 = 11,833.09 : x
  2. Step 2: Convert to fraction form
    20,785.42/28,680.55 = 11,833.09/x
  3. Step 3: Cross multiply
    20,785.42x = 28,680.55 × 11,833.09
  4. Step 4: Simplify right side
    20,785.42x = 339,379,529.40
  5. Step 5: Solve for x
    x = 339,379,529.40/20,785.42
  6. Step 6: Final answer
    x = 16,327.77

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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.