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Finding the Fourth Proportional to 12,199.78, 16,835.72 and 6,610.78

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Solution

The fourth proportional to 12,199.78, 16,835.72 and 6,610.78 is: 9,122.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,199.78 : 16,835.72 = 6,610.78 : x
  2. Step 2: Convert to fraction form
    12,199.78/16,835.72 = 6,610.78/x
  3. Step 3: Cross multiply
    12,199.78x = 16,835.72 × 6,610.78
  4. Step 4: Simplify right side
    12,199.78x = 111,297,229.05
  5. Step 5: Solve for x
    x = 111,297,229.05/12,199.78
  6. Step 6: Final answer
    x = 9,122.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.