Home / 20,858.26-31,290.80-6,814.21

Finding the Fourth Proportional to 20,858.26, 31,290.80 and 6,814.21

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Solution

The fourth proportional to 20,858.26, 31,290.80 and 6,814.21 is: 10,222.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.26 : 31,290.80 = 6,814.21 : x
  2. Step 2: Convert to fraction form
    20,858.26/31,290.80 = 6,814.21/x
  3. Step 3: Cross multiply
    20,858.26x = 31,290.80 × 6,814.21
  4. Step 4: Simplify right side
    20,858.26x = 213,222,066.97
  5. Step 5: Solve for x
    x = 213,222,066.97/20,858.26
  6. Step 6: Final answer
    x = 10,222.43

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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.