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Finding the Fourth Proportional to 19,190.88, 28,786.32 and 5,339.88

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Solution

The fourth proportional to 19,190.88, 28,786.32 and 5,339.88 is: 8,009.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,190.88 : 28,786.32 = 5,339.88 : x
  2. Step 2: Convert to fraction form
    19,190.88/28,786.32 = 5,339.88/x
  3. Step 3: Cross multiply
    19,190.88x = 28,786.32 × 5,339.88
  4. Step 4: Simplify right side
    19,190.88x = 153,715,494.44
  5. Step 5: Solve for x
    x = 153,715,494.44/19,190.88
  6. Step 6: Final answer
    x = 8,009.82

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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.