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Finding the Fourth Proportional to 21,660.25, 29,891.24 and 11,724.25

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Solution

The fourth proportional to 21,660.25, 29,891.24 and 11,724.25 is: 16,179.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.25 : 29,891.24 = 11,724.25 : x
  2. Step 2: Convert to fraction form
    21,660.25/29,891.24 = 11,724.25/x
  3. Step 3: Cross multiply
    21,660.25x = 29,891.24 × 11,724.25
  4. Step 4: Simplify right side
    21,660.25x = 350,452,370.57
  5. Step 5: Solve for x
    x = 350,452,370.57/21,660.25
  6. Step 6: Final answer
    x = 16,179.52

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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.