Home / 20,121.12-30,181.56-10,945.44

Finding the Fourth Proportional to 20,121.12, 30,181.56 and 10,945.44

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Solution

The fourth proportional to 20,121.12, 30,181.56 and 10,945.44 is: 16,418.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.12 : 30,181.56 = 10,945.44 : x
  2. Step 2: Convert to fraction form
    20,121.12/30,181.56 = 10,945.44/x
  3. Step 3: Cross multiply
    20,121.12x = 30,181.56 × 10,945.44
  4. Step 4: Simplify right side
    20,121.12x = 330,350,454.09
  5. Step 5: Solve for x
    x = 330,350,454.09/20,121.12
  6. Step 6: Final answer
    x = 16,418.09

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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.