Home / 20,121.42-30,160.22-8,420.96

Finding the Fourth Proportional to 20,121.42, 30,160.22 and 8,420.96

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Solution

The fourth proportional to 20,121.42, 30,160.22 and 8,420.96 is: 12,622.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.42 : 30,160.22 = 8,420.96 : x
  2. Step 2: Convert to fraction form
    20,121.42/30,160.22 = 8,420.96/x
  3. Step 3: Cross multiply
    20,121.42x = 30,160.22 × 8,420.96
  4. Step 4: Simplify right side
    20,121.42x = 253,978,006.21
  5. Step 5: Solve for x
    x = 253,978,006.21/20,121.42
  6. Step 6: Final answer
    x = 12,622.27

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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.