Home / 20,120.41-30,158.73-8,419.96

Finding the Fourth Proportional to 20,120.41, 30,158.73 and 8,419.96

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Solution

The fourth proportional to 20,120.41, 30,158.73 and 8,419.96 is: 12,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.41 : 30,158.73 = 8,419.96 : x
  2. Step 2: Convert to fraction form
    20,120.41/30,158.73 = 8,419.96/x
  3. Step 3: Cross multiply
    20,120.41x = 30,158.73 × 8,419.96
  4. Step 4: Simplify right side
    20,120.41x = 253,935,300.25
  5. Step 5: Solve for x
    x = 253,935,300.25/20,120.41
  6. Step 6: Final answer
    x = 12,620.78

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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.