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Finding the Fourth Proportional to 18,906.55, 28,310.27 and 13,329.70

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Solution

The fourth proportional to 18,906.55, 28,310.27 and 13,329.70 is: 19,959.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.55 : 28,310.27 = 13,329.70 : x
  2. Step 2: Convert to fraction form
    18,906.55/28,310.27 = 13,329.70/x
  3. Step 3: Cross multiply
    18,906.55x = 28,310.27 × 13,329.70
  4. Step 4: Simplify right side
    18,906.55x = 377,367,264.47
  5. Step 5: Solve for x
    x = 377,367,264.47/18,906.55
  6. Step 6: Final answer
    x = 19,959.61

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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.