Home / 20,348.43-28,081.72-12,791.89

Finding the Fourth Proportional to 20,348.43, 28,081.72 and 12,791.89

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Solution

The fourth proportional to 20,348.43, 28,081.72 and 12,791.89 is: 17,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.43 : 28,081.72 = 12,791.89 : x
  2. Step 2: Convert to fraction form
    20,348.43/28,081.72 = 12,791.89/x
  3. Step 3: Cross multiply
    20,348.43x = 28,081.72 × 12,791.89
  4. Step 4: Simplify right side
    20,348.43x = 359,218,324.34
  5. Step 5: Solve for x
    x = 359,218,324.34/20,348.43
  6. Step 6: Final answer
    x = 17,653.37

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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.