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Finding the Fourth Proportional to 15.45, 22.98 and 15.39

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Solution

The fourth proportional to 15.45, 22.98 and 15.39 is: 22.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.45 : 22.98 = 15.39 : x
  2. Step 2: Convert to fraction form
    15.45/22.98 = 15.39/x
  3. Step 3: Cross multiply
    15.45x = 22.98 × 15.39
  4. Step 4: Simplify right side
    15.45x = 353.72
  5. Step 5: Solve for x
    x = 353.72/15.45
  6. Step 6: Final answer
    x = 22.90

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