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Finding the Fourth Proportional to 21,461.80, 29,604.20 and 14,193.88

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Solution

The fourth proportional to 21,461.80, 29,604.20 and 14,193.88 is: 19,578.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,461.80 : 29,604.20 = 14,193.88 : x
  2. Step 2: Convert to fraction form
    21,461.80/29,604.20 = 14,193.88/x
  3. Step 3: Cross multiply
    21,461.80x = 29,604.20 × 14,193.88
  4. Step 4: Simplify right side
    21,461.80x = 420,198,462.30
  5. Step 5: Solve for x
    x = 420,198,462.30/21,461.80
  6. Step 6: Final answer
    x = 19,578.90

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.