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Finding the Fourth Proportional to 39,480.84, 54,481.26 and 21,576

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Solution

The fourth proportional to 39,480.84, 54,481.26 and 21,576 is: 29,773.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,480.84 : 54,481.26 = 21,576 : x
  2. Step 2: Convert to fraction form
    39,480.84/54,481.26 = 21,576/x
  3. Step 3: Cross multiply
    39,480.84x = 54,481.26 × 21,576
  4. Step 4: Simplify right side
    39,480.84x = 1,175,487,665.76
  5. Step 5: Solve for x
    x = 1,175,487,665.76/39,480.84
  6. Step 6: Final answer
    x = 29,773.62

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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.