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Finding the Fourth Proportional to 8,160.80, 11,255.64 and 5,504

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Solution

The fourth proportional to 8,160.80, 11,255.64 and 5,504 is: 7,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,160.80 : 11,255.64 = 5,504 : x
  2. Step 2: Convert to fraction form
    8,160.80/11,255.64 = 5,504/x
  3. Step 3: Cross multiply
    8,160.80x = 11,255.64 × 5,504
  4. Step 4: Simplify right side
    8,160.80x = 61,951,042.56
  5. Step 5: Solve for x
    x = 61,951,042.56/8,160.80
  6. Step 6: Final answer
    x = 7,591.30

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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.