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Finding the Fourth Proportional to 18,942.10, 28,413.15 and 16,900.90

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Solution

The fourth proportional to 18,942.10, 28,413.15 and 16,900.90 is: 25,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.10 : 28,413.15 = 16,900.90 : x
  2. Step 2: Convert to fraction form
    18,942.10/28,413.15 = 16,900.90/x
  3. Step 3: Cross multiply
    18,942.10x = 28,413.15 × 16,900.90
  4. Step 4: Simplify right side
    18,942.10x = 480,207,806.84
  5. Step 5: Solve for x
    x = 480,207,806.84/18,942.10
  6. Step 6: Final answer
    x = 25,351.35

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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.