Home / 20,115.70-30,172.20-5,324.30

Finding the Fourth Proportional to 20,115.70, 30,172.20 and 5,324.30

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Solution

The fourth proportional to 20,115.70, 30,172.20 and 5,324.30 is: 7,986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.70 : 30,172.20 = 5,324.30 : x
  2. Step 2: Convert to fraction form
    20,115.70/30,172.20 = 5,324.30/x
  3. Step 3: Cross multiply
    20,115.70x = 30,172.20 × 5,324.30
  4. Step 4: Simplify right side
    20,115.70x = 160,645,844.46
  5. Step 5: Solve for x
    x = 160,645,844.46/20,115.70
  6. Step 6: Final answer
    x = 7,986.09

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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.