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Finding the Fourth Proportional to 21,992.49, 30,350.03 and 11,921.27

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Solution

The fourth proportional to 21,992.49, 30,350.03 and 11,921.27 is: 16,451.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.49 : 30,350.03 = 11,921.27 : x
  2. Step 2: Convert to fraction form
    21,992.49/30,350.03 = 11,921.27/x
  3. Step 3: Cross multiply
    21,992.49x = 30,350.03 × 11,921.27
  4. Step 4: Simplify right side
    21,992.49x = 361,810,690.78
  5. Step 5: Solve for x
    x = 361,810,690.78/21,992.49
  6. Step 6: Final answer
    x = 16,451.56

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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.