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Finding the Fourth Proportional to 21,732.70, 29,991.10 and 11,796.70

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Solution

The fourth proportional to 21,732.70, 29,991.10 and 11,796.70 is: 16,279.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.70 : 29,991.10 = 11,796.70 : x
  2. Step 2: Convert to fraction form
    21,732.70/29,991.10 = 11,796.70/x
  3. Step 3: Cross multiply
    21,732.70x = 29,991.10 × 11,796.70
  4. Step 4: Simplify right side
    21,732.70x = 353,796,009.37
  5. Step 5: Solve for x
    x = 353,796,009.37/21,732.70
  6. Step 6: Final answer
    x = 16,279.43

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1.5x scale

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.