Home / 20,620.54-30,910.04-8,149.40

Finding the Fourth Proportional to 20,620.54, 30,910.04 and 8,149.40

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Solution

The fourth proportional to 20,620.54, 30,910.04 and 8,149.40 is: 12,215.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.54 : 30,910.04 = 8,149.40 : x
  2. Step 2: Convert to fraction form
    20,620.54/30,910.04 = 8,149.40/x
  3. Step 3: Cross multiply
    20,620.54x = 30,910.04 × 8,149.40
  4. Step 4: Simplify right side
    20,620.54x = 251,898,279.98
  5. Step 5: Solve for x
    x = 251,898,279.98/20,620.54
  6. Step 6: Final answer
    x = 12,215.89

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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.