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Finding the Fourth Proportional to 15,081.65, 20,811.97 and 8,367.15

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Solution

The fourth proportional to 15,081.65, 20,811.97 and 8,367.15 is: 11,546.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.65 : 20,811.97 = 8,367.15 : x
  2. Step 2: Convert to fraction form
    15,081.65/20,811.97 = 8,367.15/x
  3. Step 3: Cross multiply
    15,081.65x = 20,811.97 × 8,367.15
  4. Step 4: Simplify right side
    15,081.65x = 174,136,874.79
  5. Step 5: Solve for x
    x = 174,136,874.79/15,081.65
  6. Step 6: Final answer
    x = 11,546.27

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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.