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Finding the Fourth Proportional to 39,930, 55,103.66 and 22,025.49

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Solution

The fourth proportional to 39,930, 55,103.66 and 22,025.49 is: 30,395.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,930 : 55,103.66 = 22,025.49 : x
  2. Step 2: Convert to fraction form
    39,930/55,103.66 = 22,025.49/x
  3. Step 3: Cross multiply
    39,930x = 55,103.66 × 22,025.49
  4. Step 4: Simplify right side
    39,930x = 1,213,685,112.29
  5. Step 5: Solve for x
    x = 1,213,685,112.29/39,930
  6. Step 6: Final answer
    x = 30,395.32

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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.