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Finding the Fourth Proportional to 12,617.62, 18,912.08 and 7,676.37

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Solution

The fourth proportional to 12,617.62, 18,912.08 and 7,676.37 is: 11,505.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.62 : 18,912.08 = 7,676.37 : x
  2. Step 2: Convert to fraction form
    12,617.62/18,912.08 = 7,676.37/x
  3. Step 3: Cross multiply
    12,617.62x = 18,912.08 × 7,676.37
  4. Step 4: Simplify right side
    12,617.62x = 145,176,142.74
  5. Step 5: Solve for x
    x = 145,176,142.74/12,617.62
  6. Step 6: Final answer
    x = 11,505.82

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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.