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Finding the Fourth Proportional to 21.44, 29.58 and 11.74

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Solution

The fourth proportional to 21.44, 29.58 and 11.74 is: 16.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.44 : 29.58 = 11.74 : x
  2. Step 2: Convert to fraction form
    21.44/29.58 = 11.74/x
  3. Step 3: Cross multiply
    21.44x = 29.58 × 11.74
  4. Step 4: Simplify right side
    21.44x = 347.17
  5. Step 5: Solve for x
    x = 347.17/21.44
  6. Step 6: Final answer
    x = 16.19

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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.