Home / 20,751.82-28,628.24-12,791.14

Finding the Fourth Proportional to 20,751.82, 28,628.24 and 12,791.14

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Solution

The fourth proportional to 20,751.82, 28,628.24 and 12,791.14 is: 17,646.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.82 : 28,628.24 = 12,791.14 : x
  2. Step 2: Convert to fraction form
    20,751.82/28,628.24 = 12,791.14/x
  3. Step 3: Cross multiply
    20,751.82x = 28,628.24 × 12,791.14
  4. Step 4: Simplify right side
    20,751.82x = 366,187,825.79
  5. Step 5: Solve for x
    x = 366,187,825.79/20,751.82
  6. Step 6: Final answer
    x = 17,646.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.