Home / 11,221.12-16,816.68-8,611.28

Finding the Fourth Proportional to 11,221.12, 16,816.68 and 8,611.28

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Solution

The fourth proportional to 11,221.12, 16,816.68 and 8,611.28 is: 12,905.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.12 : 16,816.68 = 8,611.28 : x
  2. Step 2: Convert to fraction form
    11,221.12/16,816.68 = 8,611.28/x
  3. Step 3: Cross multiply
    11,221.12x = 16,816.68 × 8,611.28
  4. Step 4: Simplify right side
    11,221.12x = 144,813,140.15
  5. Step 5: Solve for x
    x = 144,813,140.15/11,221.12
  6. Step 6: Final answer
    x = 12,905.41

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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.