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Finding the Fourth Proportional to 19,170.66, 28,766.94 and 7,481.16

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Solution

The fourth proportional to 19,170.66, 28,766.94 and 7,481.16 is: 11,226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,170.66 : 28,766.94 = 7,481.16 : x
  2. Step 2: Convert to fraction form
    19,170.66/28,766.94 = 7,481.16/x
  3. Step 3: Cross multiply
    19,170.66x = 28,766.94 × 7,481.16
  4. Step 4: Simplify right side
    19,170.66x = 215,210,080.85
  5. Step 5: Solve for x
    x = 215,210,080.85/19,170.66
  6. Step 6: Final answer
    x = 11,226.01

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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.