Home / 8,416.80-12,625.20-6,861.60

Finding the Fourth Proportional to 8,416.80, 12,625.20 and 6,861.60

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Solution

The fourth proportional to 8,416.80, 12,625.20 and 6,861.60 is: 10,292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,416.80 : 12,625.20 = 6,861.60 : x
  2. Step 2: Convert to fraction form
    8,416.80/12,625.20 = 6,861.60/x
  3. Step 3: Cross multiply
    8,416.80x = 12,625.20 × 6,861.60
  4. Step 4: Simplify right side
    8,416.80x = 86,629,072.32
  5. Step 5: Solve for x
    x = 86,629,072.32/8,416.80
  6. Step 6: Final answer
    x = 10,292.40

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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.