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Finding the Fourth Proportional to 39,868, 55,020.36 and 21,963.04

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Solution

The fourth proportional to 39,868, 55,020.36 and 21,963.04 is: 30,310.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,868 : 55,020.36 = 21,963.04 : x
  2. Step 2: Convert to fraction form
    39,868/55,020.36 = 21,963.04/x
  3. Step 3: Cross multiply
    39,868x = 55,020.36 × 21,963.04
  4. Step 4: Simplify right side
    39,868x = 1,208,414,367.49
  5. Step 5: Solve for x
    x = 1,208,414,367.49/39,868
  6. Step 6: Final answer
    x = 30,310.38

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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.