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Finding the Fourth Proportional to 19,115.62, 28,662.63 and 7,867.83

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Solution

The fourth proportional to 19,115.62, 28,662.63 and 7,867.83 is: 11,797.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,115.62 : 28,662.63 = 7,867.83 : x
  2. Step 2: Convert to fraction form
    19,115.62/28,662.63 = 7,867.83/x
  3. Step 3: Cross multiply
    19,115.62x = 28,662.63 × 7,867.83
  4. Step 4: Simplify right side
    19,115.62x = 225,512,700.19
  5. Step 5: Solve for x
    x = 225,512,700.19/19,115.62
  6. Step 6: Final answer
    x = 11,797.30

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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.