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Finding the Fourth Proportional to 30.91, 46.38 and 14.88

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Solution

The fourth proportional to 30.91, 46.38 and 14.88 is: 22.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.91 : 46.38 = 14.88 : x
  2. Step 2: Convert to fraction form
    30.91/46.38 = 14.88/x
  3. Step 3: Cross multiply
    30.91x = 46.38 × 14.88
  4. Step 4: Simplify right side
    30.91x = 690.13
  5. Step 5: Solve for x
    x = 690.13/30.91
  6. Step 6: Final answer
    x = 22.33

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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.