Home / 12,979.51-19,469.27-3,619.55

Finding the Fourth Proportional to 12,979.51, 19,469.27 and 3,619.55

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Solution

The fourth proportional to 12,979.51, 19,469.27 and 3,619.55 is: 5,429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.51 : 19,469.27 = 3,619.55 : x
  2. Step 2: Convert to fraction form
    12,979.51/19,469.27 = 3,619.55/x
  3. Step 3: Cross multiply
    12,979.51x = 19,469.27 × 3,619.55
  4. Step 4: Simplify right side
    12,979.51x = 70,470,053.95
  5. Step 5: Solve for x
    x = 70,470,053.95/12,979.51
  6. Step 6: Final answer
    x = 5,429.33

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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.