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Finding the Fourth Proportional to 43,843.60, 65,716.80 and 18,879.40

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Solution

The fourth proportional to 43,843.60, 65,716.80 and 18,879.40 is: 28,298.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,843.60 : 65,716.80 = 18,879.40 : x
  2. Step 2: Convert to fraction form
    43,843.60/65,716.80 = 18,879.40/x
  3. Step 3: Cross multiply
    43,843.60x = 65,716.80 × 18,879.40
  4. Step 4: Simplify right side
    43,843.60x = 1,240,693,753.92
  5. Step 5: Solve for x
    x = 1,240,693,753.92/43,843.60
  6. Step 6: Final answer
    x = 28,298.17

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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.