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Finding the Fourth Proportional to 12,358, 18,537.79 and 4,961.48

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Solution

The fourth proportional to 12,358, 18,537.79 and 4,961.48 is: 7,442.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,358 : 18,537.79 = 4,961.48 : x
  2. Step 2: Convert to fraction form
    12,358/18,537.79 = 4,961.48/x
  3. Step 3: Cross multiply
    12,358x = 18,537.79 × 4,961.48
  4. Step 4: Simplify right side
    12,358x = 91,974,874.33
  5. Step 5: Solve for x
    x = 91,974,874.33/12,358
  6. Step 6: Final answer
    x = 7,442.54

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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.