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Finding the Fourth Proportional to 20.59, 28.43 and 16.99

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Solution

The fourth proportional to 20.59, 28.43 and 16.99 is: 23.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.59 : 28.43 = 16.99 : x
  2. Step 2: Convert to fraction form
    20.59/28.43 = 16.99/x
  3. Step 3: Cross multiply
    20.59x = 28.43 × 16.99
  4. Step 4: Simplify right side
    20.59x = 483.03
  5. Step 5: Solve for x
    x = 483.03/20.59
  6. Step 6: Final answer
    x = 23.46

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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.