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Finding the Fourth Proportional to 20,604.88, 28,413.87 and 16,815.83

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Solution

The fourth proportional to 20,604.88, 28,413.87 and 16,815.83 is: 23,188.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.88 : 28,413.87 = 16,815.83 : x
  2. Step 2: Convert to fraction form
    20,604.88/28,413.87 = 16,815.83/x
  3. Step 3: Cross multiply
    20,604.88x = 28,413.87 × 16,815.83
  4. Step 4: Simplify right side
    20,604.88x = 477,802,807.56
  5. Step 5: Solve for x
    x = 477,802,807.56/20,604.88
  6. Step 6: Final answer
    x = 23,188.82

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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.