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Finding the Fourth Proportional to 15,843.11, 21,863.17 and 9,128.33

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Solution

The fourth proportional to 15,843.11, 21,863.17 and 9,128.33 is: 12,596.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.11 : 21,863.17 = 9,128.33 : x
  2. Step 2: Convert to fraction form
    15,843.11/21,863.17 = 9,128.33/x
  3. Step 3: Cross multiply
    15,843.11x = 21,863.17 × 9,128.33
  4. Step 4: Simplify right side
    15,843.11x = 199,574,255.58
  5. Step 5: Solve for x
    x = 199,574,255.58/15,843.11
  6. Step 6: Final answer
    x = 12,596.91

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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.