Home / 11,220.97-15,480.60-6,439.19

Finding the Fourth Proportional to 11,220.97, 15,480.60 and 6,439.19

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Solution

The fourth proportional to 11,220.97, 15,480.60 and 6,439.19 is: 8,883.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.97 : 15,480.60 = 6,439.19 : x
  2. Step 2: Convert to fraction form
    11,220.97/15,480.60 = 6,439.19/x
  3. Step 3: Cross multiply
    11,220.97x = 15,480.60 × 6,439.19
  4. Step 4: Simplify right side
    11,220.97x = 99,682,447.31
  5. Step 5: Solve for x
    x = 99,682,447.31/11,220.97
  6. Step 6: Final answer
    x = 8,883.59

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Half scale
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Double scale
Find fourth proportional to 11,221.97, 15,481.98 and 6,440.19
Similar ratio
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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.