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Finding the Fourth Proportional to 18,729.76, 25,846.76 and 10,231.60

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Solution

The fourth proportional to 18,729.76, 25,846.76 and 10,231.60 is: 14,119.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,729.76 : 25,846.76 = 10,231.60 : x
  2. Step 2: Convert to fraction form
    18,729.76/25,846.76 = 10,231.60/x
  3. Step 3: Cross multiply
    18,729.76x = 25,846.76 × 10,231.60
  4. Step 4: Simplify right side
    18,729.76x = 264,453,709.62
  5. Step 5: Solve for x
    x = 264,453,709.62/18,729.76
  6. Step 6: Final answer
    x = 14,119.44

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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.