Home / 20,815.92-28,725.96-11,863.44

Finding the Fourth Proportional to 20,815.92, 28,725.96 and 11,863.44

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Solution

The fourth proportional to 20,815.92, 28,725.96 and 11,863.44 is: 16,371.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.92 : 28,725.96 = 11,863.44 : x
  2. Step 2: Convert to fraction form
    20,815.92/28,725.96 = 11,863.44/x
  3. Step 3: Cross multiply
    20,815.92x = 28,725.96 × 11,863.44
  4. Step 4: Simplify right side
    20,815.92x = 340,788,702.90
  5. Step 5: Solve for x
    x = 340,788,702.90/20,815.92
  6. Step 6: Final answer
    x = 16,371.54

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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.