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Finding the Fourth Proportional to 15,081.88, 20,813.12 and 8,367.12

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Solution

The fourth proportional to 15,081.88, 20,813.12 and 8,367.12 is: 11,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.88 : 20,813.12 = 8,367.12 : x
  2. Step 2: Convert to fraction form
    15,081.88/20,813.12 = 8,367.12/x
  3. Step 3: Cross multiply
    15,081.88x = 20,813.12 × 8,367.12
  4. Step 4: Simplify right side
    15,081.88x = 174,145,872.61
  5. Step 5: Solve for x
    x = 174,145,872.61/15,081.88
  6. Step 6: Final answer
    x = 11,546.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.