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Finding the Fourth Proportional to 18,465.68, 27,716.94 and 8,611.90

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Solution

The fourth proportional to 18,465.68, 27,716.94 and 8,611.90 is: 12,926.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,465.68 : 27,716.94 = 8,611.90 : x
  2. Step 2: Convert to fraction form
    18,465.68/27,716.94 = 8,611.90/x
  3. Step 3: Cross multiply
    18,465.68x = 27,716.94 × 8,611.90
  4. Step 4: Simplify right side
    18,465.68x = 238,695,515.59
  5. Step 5: Solve for x
    x = 238,695,515.59/18,465.68
  6. Step 6: Final answer
    x = 12,926.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.