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Finding the Fourth Proportional to 14,791.21, 20,412 and 8,076.92

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Solution

The fourth proportional to 14,791.21, 20,412 and 8,076.92 is: 11,146.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,791.21 : 20,412 = 8,076.92 : x
  2. Step 2: Convert to fraction form
    14,791.21/20,412 = 8,076.92/x
  3. Step 3: Cross multiply
    14,791.21x = 20,412 × 8,076.92
  4. Step 4: Simplify right side
    14,791.21x = 164,865,988.98
  5. Step 5: Solve for x
    x = 164,865,988.98/14,791.21
  6. Step 6: Final answer
    x = 11,146.22

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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.