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Finding the Fourth Proportional to 39,471.54, 54,469.74 and 21,566.64

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Solution

The fourth proportional to 39,471.54, 54,469.74 and 21,566.64 is: 29,761.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,471.54 : 54,469.74 = 21,566.64 : x
  2. Step 2: Convert to fraction form
    39,471.54/54,469.74 = 21,566.64/x
  3. Step 3: Cross multiply
    39,471.54x = 54,469.74 × 21,566.64
  4. Step 4: Simplify right side
    39,471.54x = 1,174,729,273.47
  5. Step 5: Solve for x
    x = 1,174,729,273.47/39,471.54
  6. Step 6: Final answer
    x = 29,761.42

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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.