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Finding the Fourth Proportional to 9.82, 14.70 and 9.48

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Solution

The fourth proportional to 9.82, 14.70 and 9.48 is: 14.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.82 : 14.70 = 9.48 : x
  2. Step 2: Convert to fraction form
    9.82/14.70 = 9.48/x
  3. Step 3: Cross multiply
    9.82x = 14.70 × 9.48
  4. Step 4: Simplify right side
    9.82x = 139.36
  5. Step 5: Solve for x
    x = 139.36/9.82
  6. Step 6: Final answer
    x = 14.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.