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Finding the Fourth Proportional to 15,163.84, 20,926.08 and 8,449.42

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Solution

The fourth proportional to 15,163.84, 20,926.08 and 8,449.42 is: 11,660.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.84 : 20,926.08 = 8,449.42 : x
  2. Step 2: Convert to fraction form
    15,163.84/20,926.08 = 8,449.42/x
  3. Step 3: Cross multiply
    15,163.84x = 20,926.08 × 8,449.42
  4. Step 4: Simplify right side
    15,163.84x = 176,813,238.87
  5. Step 5: Solve for x
    x = 176,813,238.87/15,163.84
  6. Step 6: Final answer
    x = 11,660.19

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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.