Home / 20,814.17-31,221.23-5,231.79

Finding the Fourth Proportional to 20,814.17, 31,221.23 and 5,231.79

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Solution

The fourth proportional to 20,814.17, 31,221.23 and 5,231.79 is: 7,847.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.17 : 31,221.23 = 5,231.79 : x
  2. Step 2: Convert to fraction form
    20,814.17/31,221.23 = 5,231.79/x
  3. Step 3: Cross multiply
    20,814.17x = 31,221.23 × 5,231.79
  4. Step 4: Simplify right side
    20,814.17x = 163,342,892.74
  5. Step 5: Solve for x
    x = 163,342,892.74/20,814.17
  6. Step 6: Final answer
    x = 7,847.68

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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.