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Finding the Fourth Proportional to 18,672, 27,998.10 and 5,522.55

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Solution

The fourth proportional to 18,672, 27,998.10 and 5,522.55 is: 8,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672 : 27,998.10 = 5,522.55 : x
  2. Step 2: Convert to fraction form
    18,672/27,998.10 = 5,522.55/x
  3. Step 3: Cross multiply
    18,672x = 27,998.10 × 5,522.55
  4. Step 4: Simplify right side
    18,672x = 154,620,907.16
  5. Step 5: Solve for x
    x = 154,620,907.16/18,672
  6. Step 6: Final answer
    x = 8,280.90

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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.