Home / 13,215.22-18,236.37-7,245.78

Finding the Fourth Proportional to 13,215.22, 18,236.37 and 7,245.78

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Solution

The fourth proportional to 13,215.22, 18,236.37 and 7,245.78 is: 9,998.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.22 : 18,236.37 = 7,245.78 : x
  2. Step 2: Convert to fraction form
    13,215.22/18,236.37 = 7,245.78/x
  3. Step 3: Cross multiply
    13,215.22x = 18,236.37 × 7,245.78
  4. Step 4: Simplify right side
    13,215.22x = 132,136,725.02
  5. Step 5: Solve for x
    x = 132,136,725.02/13,215.22
  6. Step 6: Final answer
    x = 9,998.83

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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.