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Finding the Fourth Proportional to 22.20, 30.63 and 14.91

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Solution

The fourth proportional to 22.20, 30.63 and 14.91 is: 20.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.20 : 30.63 = 14.91 : x
  2. Step 2: Convert to fraction form
    22.20/30.63 = 14.91/x
  3. Step 3: Cross multiply
    22.20x = 30.63 × 14.91
  4. Step 4: Simplify right side
    22.20x = 456.69
  5. Step 5: Solve for x
    x = 456.69/22.20
  6. Step 6: Final answer
    x = 20.57

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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.