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Finding the Fourth Proportional to 19.13, 26.30 and 18.63

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Solution

The fourth proportional to 19.13, 26.30 and 18.63 is: 25.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.13 : 26.30 = 18.63 : x
  2. Step 2: Convert to fraction form
    19.13/26.30 = 18.63/x
  3. Step 3: Cross multiply
    19.13x = 26.30 × 18.63
  4. Step 4: Simplify right side
    19.13x = 489.88
  5. Step 5: Solve for x
    x = 489.88/19.13
  6. Step 6: Final answer
    x = 25.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.