Home / 8,212.59-11,327.12-7,080.21

Finding the Fourth Proportional to 8,212.59, 11,327.12 and 7,080.21

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Solution

The fourth proportional to 8,212.59, 11,327.12 and 7,080.21 is: 9,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,212.59 : 11,327.12 = 7,080.21 : x
  2. Step 2: Convert to fraction form
    8,212.59/11,327.12 = 7,080.21/x
  3. Step 3: Cross multiply
    8,212.59x = 11,327.12 × 7,080.21
  4. Step 4: Simplify right side
    8,212.59x = 80,198,388.30
  5. Step 5: Solve for x
    x = 80,198,388.30/8,212.59
  6. Step 6: Final answer
    x = 9,765.30

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.