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Finding the Fourth Proportional to 15.55, 21.46 and 9.41

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Solution

The fourth proportional to 15.55, 21.46 and 9.41 is: 12.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.55 : 21.46 = 9.41 : x
  2. Step 2: Convert to fraction form
    15.55/21.46 = 9.41/x
  3. Step 3: Cross multiply
    15.55x = 21.46 × 9.41
  4. Step 4: Simplify right side
    15.55x = 201.91
  5. Step 5: Solve for x
    x = 201.91/15.55
  6. Step 6: Final answer
    x = 12.99

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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.