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Finding the Fourth Proportional to 8,608.20, 12,914.70 and 4,225.80

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Solution

The fourth proportional to 8,608.20, 12,914.70 and 4,225.80 is: 6,339.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.20 : 12,914.70 = 4,225.80 : x
  2. Step 2: Convert to fraction form
    8,608.20/12,914.70 = 4,225.80/x
  3. Step 3: Cross multiply
    8,608.20x = 12,914.70 × 4,225.80
  4. Step 4: Simplify right side
    8,608.20x = 54,574,939.26
  5. Step 5: Solve for x
    x = 54,574,939.26/8,608.20
  6. Step 6: Final answer
    x = 6,339.88

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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.