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Finding the Fourth Proportional to 14.30, 19.67 and 11.50

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Solution

The fourth proportional to 14.30, 19.67 and 11.50 is: 15.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.30 : 19.67 = 11.50 : x
  2. Step 2: Convert to fraction form
    14.30/19.67 = 11.50/x
  3. Step 3: Cross multiply
    14.30x = 19.67 × 11.50
  4. Step 4: Simplify right side
    14.30x = 226.21
  5. Step 5: Solve for x
    x = 226.21/14.30
  6. Step 6: Final answer
    x = 15.82

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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.