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Finding the Fourth Proportional to 39,791.82, 54,913.82 and 21,887.28

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Solution

The fourth proportional to 39,791.82, 54,913.82 and 21,887.28 is: 30,205.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,791.82 : 54,913.82 = 21,887.28 : x
  2. Step 2: Convert to fraction form
    39,791.82/54,913.82 = 21,887.28/x
  3. Step 3: Cross multiply
    39,791.82x = 54,913.82 × 21,887.28
  4. Step 4: Simplify right side
    39,791.82x = 1,201,914,044.77
  5. Step 5: Solve for x
    x = 1,201,914,044.77/39,791.82
  6. Step 6: Final answer
    x = 30,205.05

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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.