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Finding the Fourth Proportional to 20.43, 30.66 and 15.01

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Solution

The fourth proportional to 20.43, 30.66 and 15.01 is: 22.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.43 : 30.66 = 15.01 : x
  2. Step 2: Convert to fraction form
    20.43/30.66 = 15.01/x
  3. Step 3: Cross multiply
    20.43x = 30.66 × 15.01
  4. Step 4: Simplify right side
    20.43x = 460.21
  5. Step 5: Solve for x
    x = 460.21/20.43
  6. Step 6: Final answer
    x = 22.53

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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.