Home / 20,815.54-28,725.39-11,863.42

Finding the Fourth Proportional to 20,815.54, 28,725.39 and 11,863.42

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Solution

The fourth proportional to 20,815.54, 28,725.39 and 11,863.42 is: 16,371.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.54 : 28,725.39 = 11,863.42 : x
  2. Step 2: Convert to fraction form
    20,815.54/28,725.39 = 11,863.42/x
  3. Step 3: Cross multiply
    20,815.54x = 28,725.39 × 11,863.42
  4. Step 4: Simplify right side
    20,815.54x = 340,781,294.42
  5. Step 5: Solve for x
    x = 340,781,294.42/20,815.54
  6. Step 6: Final answer
    x = 16,371.49

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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.