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Finding the Fourth Proportional to 19,791.80, 29,687.70 and 6,644.60

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Solution

The fourth proportional to 19,791.80, 29,687.70 and 6,644.60 is: 9,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.80 : 29,687.70 = 6,644.60 : x
  2. Step 2: Convert to fraction form
    19,791.80/29,687.70 = 6,644.60/x
  3. Step 3: Cross multiply
    19,791.80x = 29,687.70 × 6,644.60
  4. Step 4: Simplify right side
    19,791.80x = 197,262,891.42
  5. Step 5: Solve for x
    x = 197,262,891.42/19,791.80
  6. Step 6: Final answer
    x = 9,966.90

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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.