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Finding the Fourth Proportional to 8,571.10, 12,856.65 and 8,455.90

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Solution

The fourth proportional to 8,571.10, 12,856.65 and 8,455.90 is: 12,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.10 : 12,856.65 = 8,455.90 : x
  2. Step 2: Convert to fraction form
    8,571.10/12,856.65 = 8,455.90/x
  3. Step 3: Cross multiply
    8,571.10x = 12,856.65 × 8,455.90
  4. Step 4: Simplify right side
    8,571.10x = 108,714,546.74
  5. Step 5: Solve for x
    x = 108,714,546.74/8,571.10
  6. Step 6: Final answer
    x = 12,683.85

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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.