Home / 39,696.08-54,780.77-21,791.30

Finding the Fourth Proportional to 39,696.08, 54,780.77 and 21,791.30

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Solution

The fourth proportional to 39,696.08, 54,780.77 and 21,791.30 is: 30,072.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,696.08 : 54,780.77 = 21,791.30 : x
  2. Step 2: Convert to fraction form
    39,696.08/54,780.77 = 21,791.30/x
  3. Step 3: Cross multiply
    39,696.08x = 54,780.77 × 21,791.30
  4. Step 4: Simplify right side
    39,696.08x = 1,193,743,973.88
  5. Step 5: Solve for x
    x = 1,193,743,973.88/39,696.08
  6. Step 6: Final answer
    x = 30,072.09

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1.5x scale

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.