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Finding the Fourth Proportional to 21,623.27, 29,840.09 and 11,687.27

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Solution

The fourth proportional to 21,623.27, 29,840.09 and 11,687.27 is: 16,128.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.27 : 29,840.09 = 11,687.27 : x
  2. Step 2: Convert to fraction form
    21,623.27/29,840.09 = 11,687.27/x
  3. Step 3: Cross multiply
    21,623.27x = 29,840.09 × 11,687.27
  4. Step 4: Simplify right side
    21,623.27x = 348,749,188.65
  5. Step 5: Solve for x
    x = 348,749,188.65/21,623.27
  6. Step 6: Final answer
    x = 16,128.42

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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.