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Finding the Fourth Proportional to 19.14, 26.19 and 18.69

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Solution

The fourth proportional to 19.14, 26.19 and 18.69 is: 25.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.14 : 26.19 = 18.69 : x
  2. Step 2: Convert to fraction form
    19.14/26.19 = 18.69/x
  3. Step 3: Cross multiply
    19.14x = 26.19 × 18.69
  4. Step 4: Simplify right side
    19.14x = 489.49
  5. Step 5: Solve for x
    x = 489.49/19.14
  6. Step 6: Final answer
    x = 25.57

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1.5x scale

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.