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Finding the Fourth Proportional to 39,791.50, 54,913.24 and 21,886.96

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Solution

The fourth proportional to 39,791.50, 54,913.24 and 21,886.96 is: 30,204.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,791.50 : 54,913.24 = 21,886.96 : x
  2. Step 2: Convert to fraction form
    39,791.50/54,913.24 = 21,886.96/x
  3. Step 3: Cross multiply
    39,791.50x = 54,913.24 × 21,886.96
  4. Step 4: Simplify right side
    39,791.50x = 1,201,883,887.35
  5. Step 5: Solve for x
    x = 1,201,883,887.35/39,791.50
  6. Step 6: Final answer
    x = 30,204.54

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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.