Home / 20,867.09-31,290.73-12,104.69

Finding the Fourth Proportional to 20,867.09, 31,290.73 and 12,104.69

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Solution

The fourth proportional to 20,867.09, 31,290.73 and 12,104.69 is: 18,151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.09 : 31,290.73 = 12,104.69 : x
  2. Step 2: Convert to fraction form
    20,867.09/31,290.73 = 12,104.69/x
  3. Step 3: Cross multiply
    20,867.09x = 31,290.73 × 12,104.69
  4. Step 4: Simplify right side
    20,867.09x = 378,764,399.81
  5. Step 5: Solve for x
    x = 378,764,399.81/20,867.09
  6. Step 6: Final answer
    x = 18,151.28

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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.