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Finding the Fourth Proportional to 13,544.94, 18,691.92 and 7,879.80

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Solution

The fourth proportional to 13,544.94, 18,691.92 and 7,879.80 is: 10,874.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,544.94 : 18,691.92 = 7,879.80 : x
  2. Step 2: Convert to fraction form
    13,544.94/18,691.92 = 7,879.80/x
  3. Step 3: Cross multiply
    13,544.94x = 18,691.92 × 7,879.80
  4. Step 4: Simplify right side
    13,544.94x = 147,288,591.22
  5. Step 5: Solve for x
    x = 147,288,591.22/13,544.94
  6. Step 6: Final answer
    x = 10,874.07

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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.