Home / 20,815.39-28,725.27-11,383.95

Finding the Fourth Proportional to 20,815.39, 28,725.27 and 11,383.95

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Solution

The fourth proportional to 20,815.39, 28,725.27 and 11,383.95 is: 15,709.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.39 : 28,725.27 = 11,383.95 : x
  2. Step 2: Convert to fraction form
    20,815.39/28,725.27 = 11,383.95/x
  3. Step 3: Cross multiply
    20,815.39x = 28,725.27 × 11,383.95
  4. Step 4: Simplify right side
    20,815.39x = 327,007,102.45
  5. Step 5: Solve for x
    x = 327,007,102.45/20,815.39
  6. Step 6: Final answer
    x = 15,709.87

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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.