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Finding the Fourth Proportional to 8,592.21, 11,857.29 and 4,815.45

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Solution

The fourth proportional to 8,592.21, 11,857.29 and 4,815.45 is: 6,645.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,592.21 : 11,857.29 = 4,815.45 : x
  2. Step 2: Convert to fraction form
    8,592.21/11,857.29 = 4,815.45/x
  3. Step 3: Cross multiply
    8,592.21x = 11,857.29 × 4,815.45
  4. Step 4: Simplify right side
    8,592.21x = 57,098,187.13
  5. Step 5: Solve for x
    x = 57,098,187.13/8,592.21
  6. Step 6: Final answer
    x = 6,645.34

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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.