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Finding the Fourth Proportional to 3,893.92, 5,376.18 and 2,636.92

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Solution

The fourth proportional to 3,893.92, 5,376.18 and 2,636.92 is: 3,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.92 : 5,376.18 = 2,636.92 : x
  2. Step 2: Convert to fraction form
    3,893.92/5,376.18 = 2,636.92/x
  3. Step 3: Cross multiply
    3,893.92x = 5,376.18 × 2,636.92
  4. Step 4: Simplify right side
    3,893.92x = 14,176,556.57
  5. Step 5: Solve for x
    x = 14,176,556.57/3,893.92
  6. Step 6: Final answer
    x = 3,640.69

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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.