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Finding the Fourth Proportional to 19.80, 29.70 and 6.27

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Solution

The fourth proportional to 19.80, 29.70 and 6.27 is: 9.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.80 : 29.70 = 6.27 : x
  2. Step 2: Convert to fraction form
    19.80/29.70 = 6.27/x
  3. Step 3: Cross multiply
    19.80x = 29.70 × 6.27
  4. Step 4: Simplify right side
    19.80x = 186.22
  5. Step 5: Solve for x
    x = 186.22/19.80
  6. Step 6: Final answer
    x = 9.41

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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.