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Finding the Fourth Proportional to 19,793.57, 29,686.64 and 9,930.20

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Solution

The fourth proportional to 19,793.57, 29,686.64 and 9,930.20 is: 14,893.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.57 : 29,686.64 = 9,930.20 : x
  2. Step 2: Convert to fraction form
    19,793.57/29,686.64 = 9,930.20/x
  3. Step 3: Cross multiply
    19,793.57x = 29,686.64 × 9,930.20
  4. Step 4: Simplify right side
    19,793.57x = 294,794,074.44
  5. Step 5: Solve for x
    x = 294,794,074.44/19,793.57
  6. Step 6: Final answer
    x = 14,893.43

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1.5x scale

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.