Home / 13,213.36-18,234.40-7,245.20

Finding the Fourth Proportional to 13,213.36, 18,234.40 and 7,245.20

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Solution

The fourth proportional to 13,213.36, 18,234.40 and 7,245.20 is: 9,998.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.36 : 18,234.40 = 7,245.20 : x
  2. Step 2: Convert to fraction form
    13,213.36/18,234.40 = 7,245.20/x
  3. Step 3: Cross multiply
    13,213.36x = 18,234.40 × 7,245.20
  4. Step 4: Simplify right side
    13,213.36x = 132,111,874.88
  5. Step 5: Solve for x
    x = 132,111,874.88/13,213.36
  6. Step 6: Final answer
    x = 9,998.36

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Double 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.