Home / 39,696.08-54,780.38-21,791.40

Finding the Fourth Proportional to 39,696.08, 54,780.38 and 21,791.40

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Solution

The fourth proportional to 39,696.08, 54,780.38 and 21,791.40 is: 30,072.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,696.08 : 54,780.38 = 21,791.40 : x
  2. Step 2: Convert to fraction form
    39,696.08/54,780.38 = 21,791.40/x
  3. Step 3: Cross multiply
    39,696.08x = 54,780.38 × 21,791.40
  4. Step 4: Simplify right side
    39,696.08x = 1,193,741,172.73
  5. Step 5: Solve for x
    x = 1,193,741,172.73/39,696.08
  6. Step 6: Final answer
    x = 30,072.02

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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.