Home / 13,213.62-19,820.43-3,979.62

Finding the Fourth Proportional to 13,213.62, 19,820.43 and 3,979.62

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Solution

The fourth proportional to 13,213.62, 19,820.43 and 3,979.62 is: 5,969.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.62 : 19,820.43 = 3,979.62 : x
  2. Step 2: Convert to fraction form
    13,213.62/19,820.43 = 3,979.62/x
  3. Step 3: Cross multiply
    13,213.62x = 19,820.43 × 3,979.62
  4. Step 4: Simplify right side
    13,213.62x = 78,877,779.64
  5. Step 5: Solve for x
    x = 78,877,779.64/13,213.62
  6. Step 6: Final answer
    x = 5,969.43

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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.