Home / 13,213.23-19,819.86-3,979.23

Finding the Fourth Proportional to 13,213.23, 19,819.86 and 3,979.23

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Solution

The fourth proportional to 13,213.23, 19,819.86 and 3,979.23 is: 5,968.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.23 : 19,819.86 = 3,979.23 : x
  2. Step 2: Convert to fraction form
    13,213.23/19,819.86 = 3,979.23/x
  3. Step 3: Cross multiply
    13,213.23x = 19,819.86 × 3,979.23
  4. Step 4: Simplify right side
    13,213.23x = 78,867,781.51
  5. Step 5: Solve for x
    x = 78,867,781.51/13,213.23
  6. Step 6: Final answer
    x = 5,968.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.