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Finding the Fourth Proportional to 15,163.66, 20,926.25 and 8,449.57

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Solution

The fourth proportional to 15,163.66, 20,926.25 and 8,449.57 is: 11,660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.66 : 20,926.25 = 8,449.57 : x
  2. Step 2: Convert to fraction form
    15,163.66/20,926.25 = 8,449.57/x
  3. Step 3: Cross multiply
    15,163.66x = 20,926.25 × 8,449.57
  4. Step 4: Simplify right side
    15,163.66x = 176,817,814.21
  5. Step 5: Solve for x
    x = 176,817,814.21/15,163.66
  6. Step 6: Final answer
    x = 11,660.63

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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.