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Finding the Fourth Proportional to 16.02, 20.99 and 16.02

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Solution

The fourth proportional to 16.02, 20.99 and 16.02 is: 20.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.02 : 20.99 = 16.02 : x
  2. Step 2: Convert to fraction form
    16.02/20.99 = 16.02/x
  3. Step 3: Cross multiply
    16.02x = 20.99 × 16.02
  4. Step 4: Simplify right side
    16.02x = 336.26
  5. Step 5: Solve for x
    x = 336.26/16.02
  6. Step 6: Final answer
    x = 20.99

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.