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Finding the Fourth Proportional to 36,907.90, 50,934.09 and 20,991.94

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Solution

The fourth proportional to 36,907.90, 50,934.09 and 20,991.94 is: 28,969.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,907.90 : 50,934.09 = 20,991.94 : x
  2. Step 2: Convert to fraction form
    36,907.90/50,934.09 = 20,991.94/x
  3. Step 3: Cross multiply
    36,907.90x = 50,934.09 × 20,991.94
  4. Step 4: Simplify right side
    36,907.90x = 1,069,205,361.23
  5. Step 5: Solve for x
    x = 1,069,205,361.23/36,907.90
  6. Step 6: Final answer
    x = 28,969.55

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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.