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Finding the Fourth Proportional to 8,611.20, 12,895.20 and 5,673.60

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Solution

The fourth proportional to 8,611.20, 12,895.20 and 5,673.60 is: 8,496.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.20 : 12,895.20 = 5,673.60 : x
  2. Step 2: Convert to fraction form
    8,611.20/12,895.20 = 5,673.60/x
  3. Step 3: Cross multiply
    8,611.20x = 12,895.20 × 5,673.60
  4. Step 4: Simplify right side
    8,611.20x = 73,162,206.72
  5. Step 5: Solve for x
    x = 73,162,206.72/8,611.20
  6. Step 6: Final answer
    x = 8,496.17

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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.