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Finding the Fourth Proportional to 46.28, 69.42 and 14.21

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Solution

The fourth proportional to 46.28, 69.42 and 14.21 is: 21.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.28 : 69.42 = 14.21 : x
  2. Step 2: Convert to fraction form
    46.28/69.42 = 14.21/x
  3. Step 3: Cross multiply
    46.28x = 69.42 × 14.21
  4. Step 4: Simplify right side
    46.28x = 986.39
  5. Step 5: Solve for x
    x = 986.39/46.28
  6. Step 6: Final answer
    x = 21.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.