Home / 20,815.38-28,725.94-11,383.94

Finding the Fourth Proportional to 20,815.38, 28,725.94 and 11,383.94

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Solution

The fourth proportional to 20,815.38, 28,725.94 and 11,383.94 is: 15,710.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.38 : 28,725.94 = 11,383.94 : x
  2. Step 2: Convert to fraction form
    20,815.38/28,725.94 = 11,383.94/x
  3. Step 3: Cross multiply
    20,815.38x = 28,725.94 × 11,383.94
  4. Step 4: Simplify right side
    20,815.38x = 327,014,463.45
  5. Step 5: Solve for x
    x = 327,014,463.45/20,815.38
  6. Step 6: Final answer
    x = 15,710.23

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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.