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Finding the Fourth Proportional to 15,168.75, 20,932.89 and 8,454.22

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Solution

The fourth proportional to 15,168.75, 20,932.89 and 8,454.22 is: 11,666.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,168.75 : 20,932.89 = 8,454.22 : x
  2. Step 2: Convert to fraction form
    15,168.75/20,932.89 = 8,454.22/x
  3. Step 3: Cross multiply
    15,168.75x = 20,932.89 × 8,454.22
  4. Step 4: Simplify right side
    15,168.75x = 176,971,257.30
  5. Step 5: Solve for x
    x = 176,971,257.30/15,168.75
  6. Step 6: Final answer
    x = 11,666.83

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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.