Home / 21,008.25-28,991.49-11,576.61

Finding the Fourth Proportional to 21,008.25, 28,991.49 and 11,576.61

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Solution

The fourth proportional to 21,008.25, 28,991.49 and 11,576.61 is: 15,975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.25 : 28,991.49 = 11,576.61 : x
  2. Step 2: Convert to fraction form
    21,008.25/28,991.49 = 11,576.61/x
  3. Step 3: Cross multiply
    21,008.25x = 28,991.49 × 11,576.61
  4. Step 4: Simplify right side
    21,008.25x = 335,623,173.05
  5. Step 5: Solve for x
    x = 335,623,173.05/21,008.25
  6. Step 6: Final answer
    x = 15,975.78

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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.