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Finding the Fourth Proportional to 18,811.14, 28,191.95 and 10,495.07

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Solution

The fourth proportional to 18,811.14, 28,191.95 and 10,495.07 is: 15,728.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.14 : 28,191.95 = 10,495.07 : x
  2. Step 2: Convert to fraction form
    18,811.14/28,191.95 = 10,495.07/x
  3. Step 3: Cross multiply
    18,811.14x = 28,191.95 × 10,495.07
  4. Step 4: Simplify right side
    18,811.14x = 295,876,440.33
  5. Step 5: Solve for x
    x = 295,876,440.33/18,811.14
  6. Step 6: Final answer
    x = 15,728.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.