Home / 12,979.76-19,469.36-3,619.53

Finding the Fourth Proportional to 12,979.76, 19,469.36 and 3,619.53

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Solution

The fourth proportional to 12,979.76, 19,469.36 and 3,619.53 is: 5,429.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.76 : 19,469.36 = 3,619.53 : x
  2. Step 2: Convert to fraction form
    12,979.76/19,469.36 = 3,619.53/x
  3. Step 3: Cross multiply
    12,979.76x = 19,469.36 × 3,619.53
  4. Step 4: Simplify right side
    12,979.76x = 70,469,922.69
  5. Step 5: Solve for x
    x = 70,469,922.69/12,979.76
  6. Step 6: Final answer
    x = 5,429.22

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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.