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Finding the Fourth Proportional to 9,361.76, 14,042.64 and 2,787.92

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Solution

The fourth proportional to 9,361.76, 14,042.64 and 2,787.92 is: 4,181.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.76 : 14,042.64 = 2,787.92 : x
  2. Step 2: Convert to fraction form
    9,361.76/14,042.64 = 2,787.92/x
  3. Step 3: Cross multiply
    9,361.76x = 14,042.64 × 2,787.92
  4. Step 4: Simplify right side
    9,361.76x = 39,149,756.91
  5. Step 5: Solve for x
    x = 39,149,756.91/9,361.76
  6. Step 6: Final answer
    x = 4,181.88

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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.