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Finding the Fourth Proportional to 30.43, 41.93 and 22.21

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Solution

The fourth proportional to 30.43, 41.93 and 22.21 is: 30.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.43 : 41.93 = 22.21 : x
  2. Step 2: Convert to fraction form
    30.43/41.93 = 22.21/x
  3. Step 3: Cross multiply
    30.43x = 41.93 × 22.21
  4. Step 4: Simplify right side
    30.43x = 930.94
  5. Step 5: Solve for x
    x = 930.94/30.43
  6. Step 6: Final answer
    x = 30.60

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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.