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Finding the Fourth Proportional to 18,868.17, 28,181.69 and 17,086.68

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Solution

The fourth proportional to 18,868.17, 28,181.69 and 17,086.68 is: 25,520.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.17 : 28,181.69 = 17,086.68 : x
  2. Step 2: Convert to fraction form
    18,868.17/28,181.69 = 17,086.68/x
  3. Step 3: Cross multiply
    18,868.17x = 28,181.69 × 17,086.68
  4. Step 4: Simplify right side
    18,868.17x = 481,531,497.53
  5. Step 5: Solve for x
    x = 481,531,497.53/18,868.17
  6. Step 6: Final answer
    x = 25,520.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.