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Finding the Fourth Proportional to 8,410.86, 12,630.36 and 5,255.64

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Solution

The fourth proportional to 8,410.86, 12,630.36 and 5,255.64 is: 7,892.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,410.86 : 12,630.36 = 5,255.64 : x
  2. Step 2: Convert to fraction form
    8,410.86/12,630.36 = 5,255.64/x
  3. Step 3: Cross multiply
    8,410.86x = 12,630.36 × 5,255.64
  4. Step 4: Simplify right side
    8,410.86x = 66,380,625.23
  5. Step 5: Solve for x
    x = 66,380,625.23/8,410.86
  6. Step 6: Final answer
    x = 7,892.25

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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.