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Finding the Fourth Proportional to 18,794.10, 25,920.89 and 12,080.41

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Solution

The fourth proportional to 18,794.10, 25,920.89 and 12,080.41 is: 16,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.10 : 25,920.89 = 12,080.41 : x
  2. Step 2: Convert to fraction form
    18,794.10/25,920.89 = 12,080.41/x
  3. Step 3: Cross multiply
    18,794.10x = 25,920.89 × 12,080.41
  4. Step 4: Simplify right side
    18,794.10x = 313,134,918.36
  5. Step 5: Solve for x
    x = 313,134,918.36/18,794.10
  6. Step 6: Final answer
    x = 16,661.35

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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.