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Finding the Fourth Proportional to 39,602, 54,650.76 and 21,938

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Solution

The fourth proportional to 39,602, 54,650.76 and 21,938 is: 30,274.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,602 : 54,650.76 = 21,938 : x
  2. Step 2: Convert to fraction form
    39,602/54,650.76 = 21,938/x
  3. Step 3: Cross multiply
    39,602x = 54,650.76 × 21,938
  4. Step 4: Simplify right side
    39,602x = 1,198,928,372.88
  5. Step 5: Solve for x
    x = 1,198,928,372.88/39,602
  6. Step 6: Final answer
    x = 30,274.44

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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.