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Finding the Fourth Proportional to 33,129.88, 45,719.22 and 18,990.92

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Solution

The fourth proportional to 33,129.88, 45,719.22 and 18,990.92 is: 26,207.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,129.88 : 45,719.22 = 18,990.92 : x
  2. Step 2: Convert to fraction form
    33,129.88/45,719.22 = 18,990.92/x
  3. Step 3: Cross multiply
    33,129.88x = 45,719.22 × 18,990.92
  4. Step 4: Simplify right side
    33,129.88x = 868,250,049.48
  5. Step 5: Solve for x
    x = 868,250,049.48/33,129.88
  6. Step 6: Final answer
    x = 26,207.46

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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.