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Finding the Fourth Proportional to 19, 26.20 and 16.82

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Solution

The fourth proportional to 19, 26.20 and 16.82 is: 23.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19 : 26.20 = 16.82 : x
  2. Step 2: Convert to fraction form
    19/26.20 = 16.82/x
  3. Step 3: Cross multiply
    19x = 26.20 × 16.82
  4. Step 4: Simplify right side
    19x = 440.68
  5. Step 5: Solve for x
    x = 440.68/19
  6. Step 6: Final answer
    x = 23.19

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1.5x scale

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.