Home / 20,228.20-30,342.30-18,413.80

Finding the Fourth Proportional to 20,228.20, 30,342.30 and 18,413.80

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Solution

The fourth proportional to 20,228.20, 30,342.30 and 18,413.80 is: 27,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,228.20 : 30,342.30 = 18,413.80 : x
  2. Step 2: Convert to fraction form
    20,228.20/30,342.30 = 18,413.80/x
  3. Step 3: Cross multiply
    20,228.20x = 30,342.30 × 18,413.80
  4. Step 4: Simplify right side
    20,228.20x = 558,717,043.74
  5. Step 5: Solve for x
    x = 558,717,043.74/20,228.20
  6. Step 6: Final answer
    x = 27,620.70

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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.