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Finding the Fourth Proportional to 3,893.39, 5,372.99 and 2,215.03

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Solution

The fourth proportional to 3,893.39, 5,372.99 and 2,215.03 is: 3,056.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893.39 : 5,372.99 = 2,215.03 : x
  2. Step 2: Convert to fraction form
    3,893.39/5,372.99 = 2,215.03/x
  3. Step 3: Cross multiply
    3,893.39x = 5,372.99 × 2,215.03
  4. Step 4: Simplify right side
    3,893.39x = 11,901,334.04
  5. Step 5: Solve for x
    x = 11,901,334.04/3,893.39
  6. Step 6: Final answer
    x = 3,056.81

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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.