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Finding the Fourth Proportional to 33,230.60, 49,845.90 and 21,420.80

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Solution

The fourth proportional to 33,230.60, 49,845.90 and 21,420.80 is: 32,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,230.60 : 49,845.90 = 21,420.80 : x
  2. Step 2: Convert to fraction form
    33,230.60/49,845.90 = 21,420.80/x
  3. Step 3: Cross multiply
    33,230.60x = 49,845.90 × 21,420.80
  4. Step 4: Simplify right side
    33,230.60x = 1,067,739,054.72
  5. Step 5: Solve for x
    x = 1,067,739,054.72/33,230.60
  6. Step 6: Final answer
    x = 32,131.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.