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Finding the Fourth Proportional to 11,859.54, 17,791.35 and 5,285.58

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Solution

The fourth proportional to 11,859.54, 17,791.35 and 5,285.58 is: 7,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,859.54 : 17,791.35 = 5,285.58 : x
  2. Step 2: Convert to fraction form
    11,859.54/17,791.35 = 5,285.58/x
  3. Step 3: Cross multiply
    11,859.54x = 17,791.35 × 5,285.58
  4. Step 4: Simplify right side
    11,859.54x = 94,037,603.73
  5. Step 5: Solve for x
    x = 94,037,603.73/11,859.54
  6. Step 6: Final answer
    x = 7,929.28

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1.5x scale

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.