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Finding the Fourth Proportional to 15,081.16, 20,811.76 and 8,366.66

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Solution

The fourth proportional to 15,081.16, 20,811.76 and 8,366.66 is: 11,545.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,081.16 : 20,811.76 = 8,366.66 : x
  2. Step 2: Convert to fraction form
    15,081.16/20,811.76 = 8,366.66/x
  3. Step 3: Cross multiply
    15,081.16x = 20,811.76 × 8,366.66
  4. Step 4: Simplify right side
    15,081.16x = 174,124,919.92
  5. Step 5: Solve for x
    x = 174,124,919.92/15,081.16
  6. Step 6: Final answer
    x = 11,545.86

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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.