Home / 21,002.82-28,983.90-11,571.38

Finding the Fourth Proportional to 21,002.82, 28,983.90 and 11,571.38

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Solution

The fourth proportional to 21,002.82, 28,983.90 and 11,571.38 is: 15,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.82 : 28,983.90 = 11,571.38 : x
  2. Step 2: Convert to fraction form
    21,002.82/28,983.90 = 11,571.38/x
  3. Step 3: Cross multiply
    21,002.82x = 28,983.90 × 11,571.38
  4. Step 4: Simplify right side
    21,002.82x = 335,383,720.78
  5. Step 5: Solve for x
    x = 335,383,720.78/21,002.82
  6. Step 6: Final answer
    x = 15,968.51

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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.