Home / 12,388.60-17,088.78-8,198.20

Finding the Fourth Proportional to 12,388.60, 17,088.78 and 8,198.20

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Solution

The fourth proportional to 12,388.60, 17,088.78 and 8,198.20 is: 11,308.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.60 : 17,088.78 = 8,198.20 : x
  2. Step 2: Convert to fraction form
    12,388.60/17,088.78 = 8,198.20/x
  3. Step 3: Cross multiply
    12,388.60x = 17,088.78 × 8,198.20
  4. Step 4: Simplify right side
    12,388.60x = 140,097,236.20
  5. Step 5: Solve for x
    x = 140,097,236.20/12,388.60
  6. Step 6: Final answer
    x = 11,308.56

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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.