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Finding the Fourth Proportional to 46.67, 69.99 and 19.60

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Solution

The fourth proportional to 46.67, 69.99 and 19.60 is: 29.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.67 : 69.99 = 19.60 : x
  2. Step 2: Convert to fraction form
    46.67/69.99 = 19.60/x
  3. Step 3: Cross multiply
    46.67x = 69.99 × 19.60
  4. Step 4: Simplify right side
    46.67x = 1,372.03
  5. Step 5: Solve for x
    x = 1,372.03/46.67
  6. Step 6: Final answer
    x = 29.40

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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.