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Finding the Fourth Proportional to 15,080.55, 20,811.28 and 8,366.61

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Solution

The fourth proportional to 15,080.55, 20,811.28 and 8,366.61 is: 11,545.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,080.55 : 20,811.28 = 8,366.61 : x
  2. Step 2: Convert to fraction form
    15,080.55/20,811.28 = 8,366.61/x
  3. Step 3: Cross multiply
    15,080.55x = 20,811.28 × 8,366.61
  4. Step 4: Simplify right side
    15,080.55x = 174,119,842.44
  5. Step 5: Solve for x
    x = 174,119,842.44/15,080.55
  6. Step 6: Final answer
    x = 11,545.99

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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.