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Finding the Fourth Proportional to 14.81, 22.31 and 14.40

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Solution

The fourth proportional to 14.81, 22.31 and 14.40 is: 21.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.81 : 22.31 = 14.40 : x
  2. Step 2: Convert to fraction form
    14.81/22.31 = 14.40/x
  3. Step 3: Cross multiply
    14.81x = 22.31 × 14.40
  4. Step 4: Simplify right side
    14.81x = 321.19
  5. Step 5: Solve for x
    x = 321.19/14.81
  6. Step 6: Final answer
    x = 21.69

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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.