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Finding the Fourth Proportional to 12,436, 18,654 and 3,670.79

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Solution

The fourth proportional to 12,436, 18,654 and 3,670.79 is: 5,506.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,436 : 18,654 = 3,670.79 : x
  2. Step 2: Convert to fraction form
    12,436/18,654 = 3,670.79/x
  3. Step 3: Cross multiply
    12,436x = 18,654 × 3,670.79
  4. Step 4: Simplify right side
    12,436x = 68,474,916.66
  5. Step 5: Solve for x
    x = 68,474,916.66/12,436
  6. Step 6: Final answer
    x = 5,506.19

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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.