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Finding the Fourth Proportional to 7,620.84, 11,431.92 and 2,943.12

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Solution

The fourth proportional to 7,620.84, 11,431.92 and 2,943.12 is: 4,414.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.84 : 11,431.92 = 2,943.12 : x
  2. Step 2: Convert to fraction form
    7,620.84/11,431.92 = 2,943.12/x
  3. Step 3: Cross multiply
    7,620.84x = 11,431.92 × 2,943.12
  4. Step 4: Simplify right side
    7,620.84x = 33,645,512.39
  5. Step 5: Solve for x
    x = 33,645,512.39/7,620.84
  6. Step 6: Final answer
    x = 4,414.93

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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.