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Finding the Fourth Proportional to 28,874.64, 39,831.84 and 18,245.82

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Solution

The fourth proportional to 28,874.64, 39,831.84 and 18,245.82 is: 25,169.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874.64 : 39,831.84 = 18,245.82 : x
  2. Step 2: Convert to fraction form
    28,874.64/39,831.84 = 18,245.82/x
  3. Step 3: Cross multiply
    28,874.64x = 39,831.84 × 18,245.82
  4. Step 4: Simplify right side
    28,874.64x = 726,764,582.91
  5. Step 5: Solve for x
    x = 726,764,582.91/28,874.64
  6. Step 6: Final answer
    x = 25,169.65

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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.