Home / 20,121.20-30,181.80-9,016.10

Finding the Fourth Proportional to 20,121.20, 30,181.80 and 9,016.10

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Solution

The fourth proportional to 20,121.20, 30,181.80 and 9,016.10 is: 13,524.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.20 : 30,181.80 = 9,016.10 : x
  2. Step 2: Convert to fraction form
    20,121.20/30,181.80 = 9,016.10/x
  3. Step 3: Cross multiply
    20,121.20x = 30,181.80 × 9,016.10
  4. Step 4: Simplify right side
    20,121.20x = 272,122,126.98
  5. Step 5: Solve for x
    x = 272,122,126.98/20,121.20
  6. Step 6: Final answer
    x = 13,524.15

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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.