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Finding the Fourth Proportional to 8.92, 13.38 and 2.91

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Solution

The fourth proportional to 8.92, 13.38 and 2.91 is: 4.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.92 : 13.38 = 2.91 : x
  2. Step 2: Convert to fraction form
    8.92/13.38 = 2.91/x
  3. Step 3: Cross multiply
    8.92x = 13.38 × 2.91
  4. Step 4: Simplify right side
    8.92x = 38.90
  5. Step 5: Solve for x
    x = 38.90/8.92
  6. Step 6: Final answer
    x = 4.36

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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.