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Finding the Fourth Proportional to 12.95, 17.84 and 9.30

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Solution

The fourth proportional to 12.95, 17.84 and 9.30 is: 12.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.95 : 17.84 = 9.30 : x
  2. Step 2: Convert to fraction form
    12.95/17.84 = 9.30/x
  3. Step 3: Cross multiply
    12.95x = 17.84 × 9.30
  4. Step 4: Simplify right side
    12.95x = 165.87
  5. Step 5: Solve for x
    x = 165.87/12.95
  6. Step 6: Final answer
    x = 12.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.