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Finding the Fourth Proportional to 19,222.96, 28,845.96 and 6,911.92

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Solution

The fourth proportional to 19,222.96, 28,845.96 and 6,911.92 is: 10,372.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,222.96 : 28,845.96 = 6,911.92 : x
  2. Step 2: Convert to fraction form
    19,222.96/28,845.96 = 6,911.92/x
  3. Step 3: Cross multiply
    19,222.96x = 28,845.96 × 6,911.92
  4. Step 4: Simplify right side
    19,222.96x = 199,380,967.84
  5. Step 5: Solve for x
    x = 199,380,967.84/19,222.96
  6. Step 6: Final answer
    x = 10,372.02

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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.