Home / 20,120.10-30,180.15-18,824.10

Finding the Fourth Proportional to 20,120.10, 30,180.15 and 18,824.10

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Solution

The fourth proportional to 20,120.10, 30,180.15 and 18,824.10 is: 28,236.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.10 : 30,180.15 = 18,824.10 : x
  2. Step 2: Convert to fraction form
    20,120.10/30,180.15 = 18,824.10/x
  3. Step 3: Cross multiply
    20,120.10x = 30,180.15 × 18,824.10
  4. Step 4: Simplify right side
    20,120.10x = 568,114,161.62
  5. Step 5: Solve for x
    x = 568,114,161.62/20,120.10
  6. Step 6: Final answer
    x = 28,236.15

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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.