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Finding the Fourth Proportional to 54,408, 81,612 and 21,576

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Solution

The fourth proportional to 54,408, 81,612 and 21,576 is: 32,364

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,408 : 81,612 = 21,576 : x
  2. Step 2: Convert to fraction form
    54,408/81,612 = 21,576/x
  3. Step 3: Cross multiply
    54,408x = 81,612 × 21,576
  4. Step 4: Simplify right side
    54,408x = 1,760,860,512
  5. Step 5: Solve for x
    x = 1,760,860,512/54,408
  6. Step 6: Final answer
    x = 32,364

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.