Home / 20,621.05-30,910.30-8,124.18

Finding the Fourth Proportional to 20,621.05, 30,910.30 and 8,124.18

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Solution

The fourth proportional to 20,621.05, 30,910.30 and 8,124.18 is: 12,177.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.05 : 30,910.30 = 8,124.18 : x
  2. Step 2: Convert to fraction form
    20,621.05/30,910.30 = 8,124.18/x
  3. Step 3: Cross multiply
    20,621.05x = 30,910.30 × 8,124.18
  4. Step 4: Simplify right side
    20,621.05x = 251,120,841.05
  5. Step 5: Solve for x
    x = 251,120,841.05/20,621.05
  6. Step 6: Final answer
    x = 12,177.89

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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.