Home / 20,815.26-28,725.08-11,383.83

Finding the Fourth Proportional to 20,815.26, 28,725.08 and 11,383.83

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Solution

The fourth proportional to 20,815.26, 28,725.08 and 11,383.83 is: 15,709.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.26 : 28,725.08 = 11,383.83 : x
  2. Step 2: Convert to fraction form
    20,815.26/28,725.08 = 11,383.83/x
  3. Step 3: Cross multiply
    20,815.26x = 28,725.08 × 11,383.83
  4. Step 4: Simplify right side
    20,815.26x = 327,001,370.54
  5. Step 5: Solve for x
    x = 327,001,370.54/20,815.26
  6. Step 6: Final answer
    x = 15,709.69

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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.