Home / 39,904.09-55,067.80-21,998.74

Finding the Fourth Proportional to 39,904.09, 55,067.80 and 21,998.74

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Solution

The fourth proportional to 39,904.09, 55,067.80 and 21,998.74 is: 30,358.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.09 : 55,067.80 = 21,998.74 : x
  2. Step 2: Convert to fraction form
    39,904.09/55,067.80 = 21,998.74/x
  3. Step 3: Cross multiply
    39,904.09x = 55,067.80 × 21,998.74
  4. Step 4: Simplify right side
    39,904.09x = 1,211,422,166.41
  5. Step 5: Solve for x
    x = 1,211,422,166.41/39,904.09
  6. Step 6: Final answer
    x = 30,358.34

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1.5x scale

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.