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Finding the Fourth Proportional to 18,698.99, 25,796.68 and 11,982.47

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Solution

The fourth proportional to 18,698.99, 25,796.68 and 11,982.47 is: 16,530.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.99 : 25,796.68 = 11,982.47 : x
  2. Step 2: Convert to fraction form
    18,698.99/25,796.68 = 11,982.47/x
  3. Step 3: Cross multiply
    18,698.99x = 25,796.68 × 11,982.47
  4. Step 4: Simplify right side
    18,698.99x = 309,107,785.26
  5. Step 5: Solve for x
    x = 309,107,785.26/18,698.99
  6. Step 6: Final answer
    x = 16,530.73

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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.