Home / 20,814.82-31,205.76-12,039.82

Finding the Fourth Proportional to 20,814.82, 31,205.76 and 12,039.82

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Solution

The fourth proportional to 20,814.82, 31,205.76 and 12,039.82 is: 18,050.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.82 : 31,205.76 = 12,039.82 : x
  2. Step 2: Convert to fraction form
    20,814.82/31,205.76 = 12,039.82/x
  3. Step 3: Cross multiply
    20,814.82x = 31,205.76 × 12,039.82
  4. Step 4: Simplify right side
    20,814.82x = 375,711,733.36
  5. Step 5: Solve for x
    x = 375,711,733.36/20,814.82
  6. Step 6: Final answer
    x = 18,050.20

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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.