Home / 22,121.20-33,181.80-20,431.60

Finding the Fourth Proportional to 22,121.20, 33,181.80 and 20,431.60

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Solution

The fourth proportional to 22,121.20, 33,181.80 and 20,431.60 is: 30,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,121.20 : 33,181.80 = 20,431.60 : x
  2. Step 2: Convert to fraction form
    22,121.20/33,181.80 = 20,431.60/x
  3. Step 3: Cross multiply
    22,121.20x = 33,181.80 × 20,431.60
  4. Step 4: Simplify right side
    22,121.20x = 677,957,264.88
  5. Step 5: Solve for x
    x = 677,957,264.88/22,121.20
  6. Step 6: Final answer
    x = 30,647.40

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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.