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Finding the Fourth Proportional to 11.23, 15.47 and 8.93

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Solution

The fourth proportional to 11.23, 15.47 and 8.93 is: 12.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.23 : 15.47 = 8.93 : x
  2. Step 2: Convert to fraction form
    11.23/15.47 = 8.93/x
  3. Step 3: Cross multiply
    11.23x = 15.47 × 8.93
  4. Step 4: Simplify right side
    11.23x = 138.07
  5. Step 5: Solve for x
    x = 138.07/11.23
  6. Step 6: Final answer
    x = 12.29

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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.