Home / 20,011.40-30,017.10-18,942.20

Finding the Fourth Proportional to 20,011.40, 30,017.10 and 18,942.20

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Solution

The fourth proportional to 20,011.40, 30,017.10 and 18,942.20 is: 28,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.40 : 30,017.10 = 18,942.20 : x
  2. Step 2: Convert to fraction form
    20,011.40/30,017.10 = 18,942.20/x
  3. Step 3: Cross multiply
    20,011.40x = 30,017.10 × 18,942.20
  4. Step 4: Simplify right side
    20,011.40x = 568,589,911.62
  5. Step 5: Solve for x
    x = 568,589,911.62/20,011.40
  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.