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Finding the Fourth Proportional to 33,990, 46,899.09 and 20,558.63

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Solution

The fourth proportional to 33,990, 46,899.09 and 20,558.63 is: 28,366.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,990 : 46,899.09 = 20,558.63 : x
  2. Step 2: Convert to fraction form
    33,990/46,899.09 = 20,558.63/x
  3. Step 3: Cross multiply
    33,990x = 46,899.09 × 20,558.63
  4. Step 4: Simplify right side
    33,990x = 964,180,804.15
  5. Step 5: Solve for x
    x = 964,180,804.15/33,990
  6. Step 6: Final answer
    x = 28,366.60

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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.