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Finding the Fourth Proportional to 8,427.48, 12,640.46 and 3,747.70

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Solution

The fourth proportional to 8,427.48, 12,640.46 and 3,747.70 is: 5,621.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.48 : 12,640.46 = 3,747.70 : x
  2. Step 2: Convert to fraction form
    8,427.48/12,640.46 = 3,747.70/x
  3. Step 3: Cross multiply
    8,427.48x = 12,640.46 × 3,747.70
  4. Step 4: Simplify right side
    8,427.48x = 47,372,649.00
  5. Step 5: Solve for x
    x = 47,372,649.00/8,427.48
  6. Step 6: Final answer
    x = 5,621.21

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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.