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Finding the Fourth Proportional to 39,189.71, 54,081.78 and 22,422.71

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Solution

The fourth proportional to 39,189.71, 54,081.78 and 22,422.71 is: 30,943.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,189.71 : 54,081.78 = 22,422.71 : x
  2. Step 2: Convert to fraction form
    39,189.71/54,081.78 = 22,422.71/x
  3. Step 3: Cross multiply
    39,189.71x = 54,081.78 × 22,422.71
  4. Step 4: Simplify right side
    39,189.71x = 1,212,660,069.22
  5. Step 5: Solve for x
    x = 1,212,660,069.22/39,189.71
  6. Step 6: Final answer
    x = 30,943.33

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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.