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Finding the Fourth Proportional to 38,668.39, 57,990.22 and 12,366.88

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Solution

The fourth proportional to 38,668.39, 57,990.22 and 12,366.88 is: 18,546.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,668.39 : 57,990.22 = 12,366.88 : x
  2. Step 2: Convert to fraction form
    38,668.39/57,990.22 = 12,366.88/x
  3. Step 3: Cross multiply
    38,668.39x = 57,990.22 × 12,366.88
  4. Step 4: Simplify right side
    38,668.39x = 717,158,091.91
  5. Step 5: Solve for x
    x = 717,158,091.91/38,668.39
  6. Step 6: Final answer
    x = 18,546.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.