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Finding the Fourth Proportional to 18,942.58, 28,413.90 and 12,374.26

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Solution

The fourth proportional to 18,942.58, 28,413.90 and 12,374.26 is: 18,561.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.58 : 28,413.90 = 12,374.26 : x
  2. Step 2: Convert to fraction form
    18,942.58/28,413.90 = 12,374.26/x
  3. Step 3: Cross multiply
    18,942.58x = 28,413.90 × 12,374.26
  4. Step 4: Simplify right side
    18,942.58x = 351,600,986.21
  5. Step 5: Solve for x
    x = 351,600,986.21/18,942.58
  6. Step 6: Final answer
    x = 18,561.41

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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.