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Finding the Fourth Proportional to 18,178.89, 25,086.71 and 10,221.14

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Solution

The fourth proportional to 18,178.89, 25,086.71 and 10,221.14 is: 14,105.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,178.89 : 25,086.71 = 10,221.14 : x
  2. Step 2: Convert to fraction form
    18,178.89/25,086.71 = 10,221.14/x
  3. Step 3: Cross multiply
    18,178.89x = 25,086.71 × 10,221.14
  4. Step 4: Simplify right side
    18,178.89x = 256,414,775.05
  5. Step 5: Solve for x
    x = 256,414,775.05/18,178.89
  6. Step 6: Final answer
    x = 14,105.08

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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.