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Finding the Fourth Proportional to 19,233.80, 28,850.70 and 18,942.20

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Solution

The fourth proportional to 19,233.80, 28,850.70 and 18,942.20 is: 28,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,233.80 : 28,850.70 = 18,942.20 : x
  2. Step 2: Convert to fraction form
    19,233.80/28,850.70 = 18,942.20/x
  3. Step 3: Cross multiply
    19,233.80x = 28,850.70 × 18,942.20
  4. Step 4: Simplify right side
    19,233.80x = 546,495,729.54
  5. Step 5: Solve for x
    x = 546,495,729.54/19,233.80
  6. Step 6: Final answer
    x = 28,413.30

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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.