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Finding the Fourth Proportional to 18,932.20, 28,366.90 and 11,514.22

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Solution

The fourth proportional to 18,932.20, 28,366.90 and 11,514.22 is: 17,252.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,932.20 : 28,366.90 = 11,514.22 : x
  2. Step 2: Convert to fraction form
    18,932.20/28,366.90 = 11,514.22/x
  3. Step 3: Cross multiply
    18,932.20x = 28,366.90 × 11,514.22
  4. Step 4: Simplify right side
    18,932.20x = 326,622,627.62
  5. Step 5: Solve for x
    x = 326,622,627.62/18,932.20
  6. Step 6: Final answer
    x = 17,252.23

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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.