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Finding the Fourth Proportional to 15.56, 23.19 and 15.05

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Solution

The fourth proportional to 15.56, 23.19 and 15.05 is: 22.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.56 : 23.19 = 15.05 : x
  2. Step 2: Convert to fraction form
    15.56/23.19 = 15.05/x
  3. Step 3: Cross multiply
    15.56x = 23.19 × 15.05
  4. Step 4: Simplify right side
    15.56x = 349.01
  5. Step 5: Solve for x
    x = 349.01/15.56
  6. Step 6: Final answer
    x = 22.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.