Home / 8,321.43-12,485.39-3,942.57

Finding the Fourth Proportional to 8,321.43, 12,485.39 and 3,942.57

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Solution

The fourth proportional to 8,321.43, 12,485.39 and 3,942.57 is: 5,915.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.43 : 12,485.39 = 3,942.57 : x
  2. Step 2: Convert to fraction form
    8,321.43/12,485.39 = 3,942.57/x
  3. Step 3: Cross multiply
    8,321.43x = 12,485.39 × 3,942.57
  4. Step 4: Simplify right side
    8,321.43x = 49,224,504.34
  5. Step 5: Solve for x
    x = 49,224,504.34/8,321.43
  6. Step 6: Final answer
    x = 5,915.39

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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.