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Finding the Fourth Proportional to 19.50, 26.93 and 13.74

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Solution

The fourth proportional to 19.50, 26.93 and 13.74 is: 18.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.50 : 26.93 = 13.74 : x
  2. Step 2: Convert to fraction form
    19.50/26.93 = 13.74/x
  3. Step 3: Cross multiply
    19.50x = 26.93 × 13.74
  4. Step 4: Simplify right side
    19.50x = 370.02
  5. Step 5: Solve for x
    x = 370.02/19.50
  6. Step 6: Final answer
    x = 18.98

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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.