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Finding the Fourth Proportional to 3,991.92, 5,511.44 and 3,744.08

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Solution

The fourth proportional to 3,991.92, 5,511.44 and 3,744.08 is: 5,169.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.92 : 5,511.44 = 3,744.08 : x
  2. Step 2: Convert to fraction form
    3,991.92/5,511.44 = 3,744.08/x
  3. Step 3: Cross multiply
    3,991.92x = 5,511.44 × 3,744.08
  4. Step 4: Simplify right side
    3,991.92x = 20,635,272.28
  5. Step 5: Solve for x
    x = 20,635,272.28/3,991.92
  6. Step 6: Final answer
    x = 5,169.26

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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.