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Finding the Fourth Proportional to 19.68, 29.65 and 18.36

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Solution

The fourth proportional to 19.68, 29.65 and 18.36 is: 27.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.68 : 29.65 = 18.36 : x
  2. Step 2: Convert to fraction form
    19.68/29.65 = 18.36/x
  3. Step 3: Cross multiply
    19.68x = 29.65 × 18.36
  4. Step 4: Simplify right side
    19.68x = 544.37
  5. Step 5: Solve for x
    x = 544.37/19.68
  6. Step 6: Final answer
    x = 27.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.