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Finding the Fourth Proportional to 8,426.70, 12,647.70 and 4,269.60

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Solution

The fourth proportional to 8,426.70, 12,647.70 and 4,269.60 is: 6,408.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.70 : 12,647.70 = 4,269.60 : x
  2. Step 2: Convert to fraction form
    8,426.70/12,647.70 = 4,269.60/x
  3. Step 3: Cross multiply
    8,426.70x = 12,647.70 × 4,269.60
  4. Step 4: Simplify right side
    8,426.70x = 54,000,619.92
  5. Step 5: Solve for x
    x = 54,000,619.92/8,426.70
  6. Step 6: Final answer
    x = 6,408.28

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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.