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Finding the Fourth Proportional to 14.27, 19.68 and 13.40

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Solution

The fourth proportional to 14.27, 19.68 and 13.40 is: 18.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.27 : 19.68 = 13.40 : x
  2. Step 2: Convert to fraction form
    14.27/19.68 = 13.40/x
  3. Step 3: Cross multiply
    14.27x = 19.68 × 13.40
  4. Step 4: Simplify right side
    14.27x = 263.61
  5. Step 5: Solve for x
    x = 263.61/14.27
  6. Step 6: Final answer
    x = 18.48

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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.