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Finding the Fourth Proportional to 13.79, 19.02 and 8.94

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Solution

The fourth proportional to 13.79, 19.02 and 8.94 is: 12.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.79 : 19.02 = 8.94 : x
  2. Step 2: Convert to fraction form
    13.79/19.02 = 8.94/x
  3. Step 3: Cross multiply
    13.79x = 19.02 × 8.94
  4. Step 4: Simplify right side
    13.79x = 170.04
  5. Step 5: Solve for x
    x = 170.04/13.79
  6. Step 6: Final answer
    x = 12.34

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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.