Home / 20,910.46-31,341.82-8,422.48

Finding the Fourth Proportional to 20,910.46, 31,341.82 and 8,422.48

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Solution

The fourth proportional to 20,910.46, 31,341.82 and 8,422.48 is: 12,624.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.46 : 31,341.82 = 8,422.48 : x
  2. Step 2: Convert to fraction form
    20,910.46/31,341.82 = 8,422.48/x
  3. Step 3: Cross multiply
    20,910.46x = 31,341.82 × 8,422.48
  4. Step 4: Simplify right side
    20,910.46x = 263,975,810.00
  5. Step 5: Solve for x
    x = 263,975,810.00/20,910.46
  6. Step 6: Final answer
    x = 12,624.11

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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.