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Finding the Fourth Proportional to 30,394.63, 41,963.85 and 20,850.51

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Solution

The fourth proportional to 30,394.63, 41,963.85 and 20,850.51 is: 28,786.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,394.63 : 41,963.85 = 20,850.51 : x
  2. Step 2: Convert to fraction form
    30,394.63/41,963.85 = 20,850.51/x
  3. Step 3: Cross multiply
    30,394.63x = 41,963.85 × 20,850.51
  4. Step 4: Simplify right side
    30,394.63x = 874,967,674.06
  5. Step 5: Solve for x
    x = 874,967,674.06/30,394.63
  6. Step 6: Final answer
    x = 28,786.92

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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.