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Finding the Fourth Proportional to 21,606, 29,816.28 and 11,670

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Solution

The fourth proportional to 21,606, 29,816.28 and 11,670 is: 16,104.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,606 : 29,816.28 = 11,670 : x
  2. Step 2: Convert to fraction form
    21,606/29,816.28 = 11,670/x
  3. Step 3: Cross multiply
    21,606x = 29,816.28 × 11,670
  4. Step 4: Simplify right side
    21,606x = 347,955,987.60
  5. Step 5: Solve for x
    x = 347,955,987.60/21,606
  6. Step 6: Final answer
    x = 16,104.60

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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.