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Finding the Fourth Proportional to 8,541.88, 11,787.79 and 4,815.88

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Solution

The fourth proportional to 8,541.88, 11,787.79 and 4,815.88 is: 6,645.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,541.88 : 11,787.79 = 4,815.88 : x
  2. Step 2: Convert to fraction form
    8,541.88/11,787.79 = 4,815.88/x
  3. Step 3: Cross multiply
    8,541.88x = 11,787.79 × 4,815.88
  4. Step 4: Simplify right side
    8,541.88x = 56,768,523.17
  5. Step 5: Solve for x
    x = 56,768,523.17/8,541.88
  6. Step 6: Final answer
    x = 6,645.91

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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.