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Finding the Fourth Proportional to 8,453.40, 12,680.88 and 2,611.68

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Solution

The fourth proportional to 8,453.40, 12,680.88 and 2,611.68 is: 3,917.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,453.40 : 12,680.88 = 2,611.68 : x
  2. Step 2: Convert to fraction form
    8,453.40/12,680.88 = 2,611.68/x
  3. Step 3: Cross multiply
    8,453.40x = 12,680.88 × 2,611.68
  4. Step 4: Simplify right side
    8,453.40x = 33,118,400.68
  5. Step 5: Solve for x
    x = 33,118,400.68/8,453.40
  6. Step 6: Final answer
    x = 3,917.76

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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.