Home / 12,743.82-19,115.74-3,979.49

Finding the Fourth Proportional to 12,743.82, 19,115.74 and 3,979.49

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Solution

The fourth proportional to 12,743.82, 19,115.74 and 3,979.49 is: 5,969.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,743.82 : 19,115.74 = 3,979.49 : x
  2. Step 2: Convert to fraction form
    12,743.82/19,115.74 = 3,979.49/x
  3. Step 3: Cross multiply
    12,743.82x = 19,115.74 × 3,979.49
  4. Step 4: Simplify right side
    12,743.82x = 76,070,896.17
  5. Step 5: Solve for x
    x = 76,070,896.17/12,743.82
  6. Step 6: Final answer
    x = 5,969.24

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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.