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Finding the Fourth Proportional to 14.04, 21.15 and 13.50

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Solution

The fourth proportional to 14.04, 21.15 and 13.50 is: 20.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.04 : 21.15 = 13.50 : x
  2. Step 2: Convert to fraction form
    14.04/21.15 = 13.50/x
  3. Step 3: Cross multiply
    14.04x = 21.15 × 13.50
  4. Step 4: Simplify right side
    14.04x = 285.53
  5. Step 5: Solve for x
    x = 285.53/14.04
  6. Step 6: Final answer
    x = 20.34

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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.