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Finding the Fourth Proportional to 3,893.97, 5,372.91 and 2,215.38

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Solution

The fourth proportional to 3,893.97, 5,372.91 and 2,215.38 is: 3,056.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.97 : 5,372.91 = 2,215.38 : x
  2. Step 2: Convert to fraction form
    3,893.97/5,372.91 = 2,215.38/x
  3. Step 3: Cross multiply
    3,893.97x = 5,372.91 × 2,215.38
  4. Step 4: Simplify right side
    3,893.97x = 11,903,037.36
  5. Step 5: Solve for x
    x = 11,903,037.36/3,893.97
  6. Step 6: Final answer
    x = 3,056.79

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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.