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Finding the Fourth Proportional to 13.95, 21.11 and 13.95

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Solution

The fourth proportional to 13.95, 21.11 and 13.95 is: 21.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.95 : 21.11 = 13.95 : x
  2. Step 2: Convert to fraction form
    13.95/21.11 = 13.95/x
  3. Step 3: Cross multiply
    13.95x = 21.11 × 13.95
  4. Step 4: Simplify right side
    13.95x = 294.41
  5. Step 5: Solve for x
    x = 294.41/13.95
  6. Step 6: Final answer
    x = 21.11

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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.