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Finding the Fourth Proportional to 14,993.87, 20,691.68 and 8,279.78

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Solution

The fourth proportional to 14,993.87, 20,691.68 and 8,279.78 is: 11,426.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993.87 : 20,691.68 = 8,279.78 : x
  2. Step 2: Convert to fraction form
    14,993.87/20,691.68 = 8,279.78/x
  3. Step 3: Cross multiply
    14,993.87x = 20,691.68 × 8,279.78
  4. Step 4: Simplify right side
    14,993.87x = 171,322,413.37
  5. Step 5: Solve for x
    x = 171,322,413.37/14,993.87
  6. Step 6: Final answer
    x = 11,426.17

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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.