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Finding the Fourth Proportional to 18,219.70, 27,293.10 and 12,314.80

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Solution

The fourth proportional to 18,219.70, 27,293.10 and 12,314.80 is: 18,447.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.70 : 27,293.10 = 12,314.80 : x
  2. Step 2: Convert to fraction form
    18,219.70/27,293.10 = 12,314.80/x
  3. Step 3: Cross multiply
    18,219.70x = 27,293.10 × 12,314.80
  4. Step 4: Simplify right side
    18,219.70x = 336,109,067.88
  5. Step 5: Solve for x
    x = 336,109,067.88/18,219.70
  6. Step 6: Final answer
    x = 18,447.56

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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.