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Finding the Fourth Proportional to 22.67, 30.86 and 22.31

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Solution

The fourth proportional to 22.67, 30.86 and 22.31 is: 30.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.67 : 30.86 = 22.31 : x
  2. Step 2: Convert to fraction form
    22.67/30.86 = 22.31/x
  3. Step 3: Cross multiply
    22.67x = 30.86 × 22.31
  4. Step 4: Simplify right side
    22.67x = 688.49
  5. Step 5: Solve for x
    x = 688.49/22.67
  6. Step 6: Final answer
    x = 30.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.