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Finding the Fourth Proportional to 43,894.20, 65,821.20 and 18,922.32

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Solution

The fourth proportional to 43,894.20, 65,821.20 and 18,922.32 is: 28,374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,894.20 : 65,821.20 = 18,922.32 : x
  2. Step 2: Convert to fraction form
    43,894.20/65,821.20 = 18,922.32/x
  3. Step 3: Cross multiply
    43,894.20x = 65,821.20 × 18,922.32
  4. Step 4: Simplify right side
    43,894.20x = 1,245,489,809.18
  5. Step 5: Solve for x
    x = 1,245,489,809.18/43,894.20
  6. Step 6: Final answer
    x = 28,374.82

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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.