Home / 39,959.26-55,143.41-21,809.80

Finding the Fourth Proportional to 39,959.26, 55,143.41 and 21,809.80

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Solution

The fourth proportional to 39,959.26, 55,143.41 and 21,809.80 is: 30,097.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,959.26 : 55,143.41 = 21,809.80 : x
  2. Step 2: Convert to fraction form
    39,959.26/55,143.41 = 21,809.80/x
  3. Step 3: Cross multiply
    39,959.26x = 55,143.41 × 21,809.80
  4. Step 4: Simplify right side
    39,959.26x = 1,202,666,725.87
  5. Step 5: Solve for x
    x = 1,202,666,725.87/39,959.26
  6. Step 6: Final answer
    x = 30,097.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.