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Finding the Fourth Proportional to 18,958.11, 28,414.11 and 13,413.06

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Solution

The fourth proportional to 18,958.11, 28,414.11 and 13,413.06 is: 20,103.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.11 : 28,414.11 = 13,413.06 : x
  2. Step 2: Convert to fraction form
    18,958.11/28,414.11 = 13,413.06/x
  3. Step 3: Cross multiply
    18,958.11x = 28,414.11 × 13,413.06
  4. Step 4: Simplify right side
    18,958.11x = 381,120,162.28
  5. Step 5: Solve for x
    x = 381,120,162.28/18,958.11
  6. Step 6: Final answer
    x = 20,103.28

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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.