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Finding the Fourth Proportional to 18,992.44, 28,488.66 and 5,141.44

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Solution

The fourth proportional to 18,992.44, 28,488.66 and 5,141.44 is: 7,712.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.44 : 28,488.66 = 5,141.44 : x
  2. Step 2: Convert to fraction form
    18,992.44/28,488.66 = 5,141.44/x
  3. Step 3: Cross multiply
    18,992.44x = 28,488.66 × 5,141.44
  4. Step 4: Simplify right side
    18,992.44x = 146,472,736.07
  5. Step 5: Solve for x
    x = 146,472,736.07/18,992.44
  6. Step 6: Final answer
    x = 7,712.16

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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.