Home / 8,187.20-11,275.11-7,449.09

Finding the Fourth Proportional to 8,187.20, 11,275.11 and 7,449.09

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Solution

The fourth proportional to 8,187.20, 11,275.11 and 7,449.09 is: 10,258.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.20 : 11,275.11 = 7,449.09 : x
  2. Step 2: Convert to fraction form
    8,187.20/11,275.11 = 7,449.09/x
  3. Step 3: Cross multiply
    8,187.20x = 11,275.11 × 7,449.09
  4. Step 4: Simplify right side
    8,187.20x = 83,989,309.15
  5. Step 5: Solve for x
    x = 83,989,309.15/8,187.20
  6. Step 6: Final answer
    x = 10,258.61

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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.