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Finding the Fourth Proportional to 8,586.80, 12,880.20 and 7,930.70

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Solution

The fourth proportional to 8,586.80, 12,880.20 and 7,930.70 is: 11,896.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.80 : 12,880.20 = 7,930.70 : x
  2. Step 2: Convert to fraction form
    8,586.80/12,880.20 = 7,930.70/x
  3. Step 3: Cross multiply
    8,586.80x = 12,880.20 × 7,930.70
  4. Step 4: Simplify right side
    8,586.80x = 102,149,002.14
  5. Step 5: Solve for x
    x = 102,149,002.14/8,586.80
  6. Step 6: Final answer
    x = 11,896.05

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Similar ratio
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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.