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Finding the Fourth Proportional to 20.26, 30.51 and 20.06

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Solution

The fourth proportional to 20.26, 30.51 and 20.06 is: 30.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.26 : 30.51 = 20.06 : x
  2. Step 2: Convert to fraction form
    20.26/30.51 = 20.06/x
  3. Step 3: Cross multiply
    20.26x = 30.51 × 20.06
  4. Step 4: Simplify right side
    20.26x = 612.03
  5. Step 5: Solve for x
    x = 612.03/20.26
  6. Step 6: Final answer
    x = 30.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.