Home / 39,695.36-54,780.64-21,791.52

Finding the Fourth Proportional to 39,695.36, 54,780.64 and 21,791.52

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Solution

The fourth proportional to 39,695.36, 54,780.64 and 21,791.52 is: 30,072.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,695.36 : 54,780.64 = 21,791.52 : x
  2. Step 2: Convert to fraction form
    39,695.36/54,780.64 = 21,791.52/x
  3. Step 3: Cross multiply
    39,695.36x = 54,780.64 × 21,791.52
  4. Step 4: Simplify right side
    39,695.36x = 1,193,753,412.17
  5. Step 5: Solve for x
    x = 1,193,753,412.17/39,695.36
  6. Step 6: Final answer
    x = 30,072.87

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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.