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Finding the Fourth Proportional to 22,290.96, 30,760.92 and 12,858.96

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Solution

The fourth proportional to 22,290.96, 30,760.92 and 12,858.96 is: 17,745.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,290.96 : 30,760.92 = 12,858.96 : x
  2. Step 2: Convert to fraction form
    22,290.96/30,760.92 = 12,858.96/x
  3. Step 3: Cross multiply
    22,290.96x = 30,760.92 × 12,858.96
  4. Step 4: Simplify right side
    22,290.96x = 395,553,439.84
  5. Step 5: Solve for x
    x = 395,553,439.84/22,290.96
  6. Step 6: Final answer
    x = 17,745.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.