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Finding the Fourth Proportional to 17,991.15, 26,951.65 and 10,953.71

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Solution

The fourth proportional to 17,991.15, 26,951.65 and 10,953.71 is: 16,409.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.15 : 26,951.65 = 10,953.71 : x
  2. Step 2: Convert to fraction form
    17,991.15/26,951.65 = 10,953.71/x
  3. Step 3: Cross multiply
    17,991.15x = 26,951.65 × 10,953.71
  4. Step 4: Simplify right side
    17,991.15x = 295,220,598.12
  5. Step 5: Solve for x
    x = 295,220,598.12/17,991.15
  6. Step 6: Final answer
    x = 16,409.21

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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.