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Finding the Fourth Proportional to 19.80, 29.59 and 16.77

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Solution

The fourth proportional to 19.80, 29.59 and 16.77 is: 25.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.80 : 29.59 = 16.77 : x
  2. Step 2: Convert to fraction form
    19.80/29.59 = 16.77/x
  3. Step 3: Cross multiply
    19.80x = 29.59 × 16.77
  4. Step 4: Simplify right side
    19.80x = 496.22
  5. Step 5: Solve for x
    x = 496.22/19.80
  6. Step 6: Final answer
    x = 25.06

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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.