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Finding the Fourth Proportional to 19.80, 29.55 and 16.98

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Solution

The fourth proportional to 19.80, 29.55 and 16.98 is: 25.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.80 : 29.55 = 16.98 : x
  2. Step 2: Convert to fraction form
    19.80/29.55 = 16.98/x
  3. Step 3: Cross multiply
    19.80x = 29.55 × 16.98
  4. Step 4: Simplify right side
    19.80x = 501.76
  5. Step 5: Solve for x
    x = 501.76/19.80
  6. Step 6: Final answer
    x = 25.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.