Home / 20,815.86-31,224.09-6,775.96

Finding the Fourth Proportional to 20,815.86, 31,224.09 and 6,775.96

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Solution

The fourth proportional to 20,815.86, 31,224.09 and 6,775.96 is: 10,164.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.86 : 31,224.09 = 6,775.96 : x
  2. Step 2: Convert to fraction form
    20,815.86/31,224.09 = 6,775.96/x
  3. Step 3: Cross multiply
    20,815.86x = 31,224.09 × 6,775.96
  4. Step 4: Simplify right side
    20,815.86x = 211,573,184.88
  5. Step 5: Solve for x
    x = 211,573,184.88/20,815.86
  6. Step 6: Final answer
    x = 10,164.04

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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.