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Finding the Fourth Proportional to 18,508.47, 27,771.78 and 8,648.44

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Solution

The fourth proportional to 18,508.47, 27,771.78 and 8,648.44 is: 12,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.47 : 27,771.78 = 8,648.44 : x
  2. Step 2: Convert to fraction form
    18,508.47/27,771.78 = 8,648.44/x
  3. Step 3: Cross multiply
    18,508.47x = 27,771.78 × 8,648.44
  4. Step 4: Simplify right side
    18,508.47x = 240,182,536.03
  5. Step 5: Solve for x
    x = 240,182,536.03/18,508.47
  6. Step 6: Final answer
    x = 12,976.90

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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.