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Finding the Fourth Proportional to 9.45, 12.98 and 9.45

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Solution

The fourth proportional to 9.45, 12.98 and 9.45 is: 12.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.45 : 12.98 = 9.45 : x
  2. Step 2: Convert to fraction form
    9.45/12.98 = 9.45/x
  3. Step 3: Cross multiply
    9.45x = 12.98 × 9.45
  4. Step 4: Simplify right side
    9.45x = 122.63
  5. Step 5: Solve for x
    x = 122.63/9.45
  6. Step 6: Final answer
    x = 12.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.