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Finding the Fourth Proportional to 18,879.60, 28,273.86 and 14,917.08

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Solution

The fourth proportional to 18,879.60, 28,273.86 and 14,917.08 is: 22,339.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.60 : 28,273.86 = 14,917.08 : x
  2. Step 2: Convert to fraction form
    18,879.60/28,273.86 = 14,917.08/x
  3. Step 3: Cross multiply
    18,879.60x = 28,273.86 × 14,917.08
  4. Step 4: Simplify right side
    18,879.60x = 421,763,431.53
  5. Step 5: Solve for x
    x = 421,763,431.53/18,879.60
  6. Step 6: Final answer
    x = 22,339.64

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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.