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Finding the Fourth Proportional to 8,586.10, 12,879.15 and 6,639.70

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Solution

The fourth proportional to 8,586.10, 12,879.15 and 6,639.70 is: 9,959.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.10 : 12,879.15 = 6,639.70 : x
  2. Step 2: Convert to fraction form
    8,586.10/12,879.15 = 6,639.70/x
  3. Step 3: Cross multiply
    8,586.10x = 12,879.15 × 6,639.70
  4. Step 4: Simplify right side
    8,586.10x = 85,513,692.26
  5. Step 5: Solve for x
    x = 85,513,692.26/8,586.10
  6. Step 6: Final answer
    x = 9,959.55

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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.