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Finding the Fourth Proportional to 7,486.80, 11,233.80 and 5,731.20

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Solution

The fourth proportional to 7,486.80, 11,233.80 and 5,731.20 is: 8,599.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,486.80 : 11,233.80 = 5,731.20 : x
  2. Step 2: Convert to fraction form
    7,486.80/11,233.80 = 5,731.20/x
  3. Step 3: Cross multiply
    7,486.80x = 11,233.80 × 5,731.20
  4. Step 4: Simplify right side
    7,486.80x = 64,383,154.56
  5. Step 5: Solve for x
    x = 64,383,154.56/7,486.80
  6. Step 6: Final answer
    x = 8,599.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.