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Finding the Fourth Proportional to 18,992.82, 28,486.58 and 4,951.70

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Solution

The fourth proportional to 18,992.82, 28,486.58 and 4,951.70 is: 7,426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.82 : 28,486.58 = 4,951.70 : x
  2. Step 2: Convert to fraction form
    18,992.82/28,486.58 = 4,951.70/x
  3. Step 3: Cross multiply
    18,992.82x = 28,486.58 × 4,951.70
  4. Step 4: Simplify right side
    18,992.82x = 141,056,998.19
  5. Step 5: Solve for x
    x = 141,056,998.19/18,992.82
  6. Step 6: Final answer
    x = 7,426.86

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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.