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Finding the Fourth Proportional to 18,611.10, 27,878.94 and 9,222.84

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Solution

The fourth proportional to 18,611.10, 27,878.94 and 9,222.84 is: 13,815.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.10 : 27,878.94 = 9,222.84 : x
  2. Step 2: Convert to fraction form
    18,611.10/27,878.94 = 9,222.84/x
  3. Step 3: Cross multiply
    18,611.10x = 27,878.94 × 9,222.84
  4. Step 4: Simplify right side
    18,611.10x = 257,123,002.99
  5. Step 5: Solve for x
    x = 257,123,002.99/18,611.10
  6. Step 6: Final answer
    x = 13,815.57

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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.