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Finding the Fourth Proportional to 12,608.70, 18,914.85 and 4,287.30

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Solution

The fourth proportional to 12,608.70, 18,914.85 and 4,287.30 is: 6,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.70 : 18,914.85 = 4,287.30 : x
  2. Step 2: Convert to fraction form
    12,608.70/18,914.85 = 4,287.30/x
  3. Step 3: Cross multiply
    12,608.70x = 18,914.85 × 4,287.30
  4. Step 4: Simplify right side
    12,608.70x = 81,093,636.41
  5. Step 5: Solve for x
    x = 81,093,636.41/12,608.70
  6. Step 6: Final answer
    x = 6,431.56

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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.