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Finding the Fourth Proportional to 18,120.47, 27,149.94 and 8,764.88

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Solution

The fourth proportional to 18,120.47, 27,149.94 and 8,764.88 is: 13,132.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.47 : 27,149.94 = 8,764.88 : x
  2. Step 2: Convert to fraction form
    18,120.47/27,149.94 = 8,764.88/x
  3. Step 3: Cross multiply
    18,120.47x = 27,149.94 × 8,764.88
  4. Step 4: Simplify right side
    18,120.47x = 237,965,830.36
  5. Step 5: Solve for x
    x = 237,965,830.36/18,120.47
  6. Step 6: Final answer
    x = 13,132.44

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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.