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Finding the Fourth Proportional to 18,953.91, 26,147.94 and 10,991.52

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Solution

The fourth proportional to 18,953.91, 26,147.94 and 10,991.52 is: 15,163.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.91 : 26,147.94 = 10,991.52 : x
  2. Step 2: Convert to fraction form
    18,953.91/26,147.94 = 10,991.52/x
  3. Step 3: Cross multiply
    18,953.91x = 26,147.94 × 10,991.52
  4. Step 4: Simplify right side
    18,953.91x = 287,405,564.25
  5. Step 5: Solve for x
    x = 287,405,564.25/18,953.91
  6. Step 6: Final answer
    x = 15,163.39

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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.