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Finding the Fourth Proportional to 30.98, 46.46 and 11.74

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Solution

The fourth proportional to 30.98, 46.46 and 11.74 is: 17.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.98 : 46.46 = 11.74 : x
  2. Step 2: Convert to fraction form
    30.98/46.46 = 11.74/x
  3. Step 3: Cross multiply
    30.98x = 46.46 × 11.74
  4. Step 4: Simplify right side
    30.98x = 545.15
  5. Step 5: Solve for x
    x = 545.15/30.98
  6. Step 6: Final answer
    x = 17.60

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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.