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Finding the Fourth Proportional to 21,061.28, 29,063.81 and 11,629.64

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Solution

The fourth proportional to 21,061.28, 29,063.81 and 11,629.64 is: 16,048.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.28 : 29,063.81 = 11,629.64 : x
  2. Step 2: Convert to fraction form
    21,061.28/29,063.81 = 11,629.64/x
  3. Step 3: Cross multiply
    21,061.28x = 29,063.81 × 11,629.64
  4. Step 4: Simplify right side
    21,061.28x = 338,001,589.18
  5. Step 5: Solve for x
    x = 338,001,589.18/21,061.28
  6. Step 6: Final answer
    x = 16,048.48

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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.