Home / 20,858.33-31,287.69-8,209.37

Finding the Fourth Proportional to 20,858.33, 31,287.69 and 8,209.37

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Solution

The fourth proportional to 20,858.33, 31,287.69 and 8,209.37 is: 12,314.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.33 : 31,287.69 = 8,209.37 : x
  2. Step 2: Convert to fraction form
    20,858.33/31,287.69 = 8,209.37/x
  3. Step 3: Cross multiply
    20,858.33x = 31,287.69 × 8,209.37
  4. Step 4: Simplify right side
    20,858.33x = 256,852,067.22
  5. Step 5: Solve for x
    x = 256,852,067.22/20,858.33
  6. Step 6: Final answer
    x = 12,314.13

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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.