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Finding the Fourth Proportional to 3,892.66, 5,370.96 and 2,213.68

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Solution

The fourth proportional to 3,892.66, 5,370.96 and 2,213.68 is: 3,054.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,892.66 : 5,370.96 = 2,213.68 : x
  2. Step 2: Convert to fraction form
    3,892.66/5,370.96 = 2,213.68/x
  3. Step 3: Cross multiply
    3,892.66x = 5,370.96 × 2,213.68
  4. Step 4: Simplify right side
    3,892.66x = 11,889,586.73
  5. Step 5: Solve for x
    x = 11,889,586.73/3,892.66
  6. Step 6: Final answer
    x = 3,054.36

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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.