Home / 20,400.10-30,600.15-20,205.70

Finding the Fourth Proportional to 20,400.10, 30,600.15 and 20,205.70

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Solution

The fourth proportional to 20,400.10, 30,600.15 and 20,205.70 is: 30,308.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.10 : 30,600.15 = 20,205.70 : x
  2. Step 2: Convert to fraction form
    20,400.10/30,600.15 = 20,205.70/x
  3. Step 3: Cross multiply
    20,400.10x = 30,600.15 × 20,205.70
  4. Step 4: Simplify right side
    20,400.10x = 618,297,450.86
  5. Step 5: Solve for x
    x = 618,297,450.86/20,400.10
  6. Step 6: Final answer
    x = 30,308.55

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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.