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Finding the Fourth Proportional to 54,267.70, 81,413.70 and 20,984.80

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Solution

The fourth proportional to 54,267.70, 81,413.70 and 20,984.80 is: 31,481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,267.70 : 81,413.70 = 20,984.80 : x
  2. Step 2: Convert to fraction form
    54,267.70/81,413.70 = 20,984.80/x
  3. Step 3: Cross multiply
    54,267.70x = 81,413.70 × 20,984.80
  4. Step 4: Simplify right side
    54,267.70x = 1,708,450,211.76
  5. Step 5: Solve for x
    x = 1,708,450,211.76/54,267.70
  6. Step 6: Final answer
    x = 31,481.90

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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.