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Finding the Fourth Proportional to 21,372.59, 29,493.59 and 11,941.16

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Solution

The fourth proportional to 21,372.59, 29,493.59 and 11,941.16 is: 16,478.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,372.59 : 29,493.59 = 11,941.16 : x
  2. Step 2: Convert to fraction form
    21,372.59/29,493.59 = 11,941.16/x
  3. Step 3: Cross multiply
    21,372.59x = 29,493.59 × 11,941.16
  4. Step 4: Simplify right side
    21,372.59x = 352,187,469.99
  5. Step 5: Solve for x
    x = 352,187,469.99/21,372.59
  6. Step 6: Final answer
    x = 16,478.47

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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.