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Finding the Fourth Proportional to 10.45, 14.40 and 6.81

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Solution

The fourth proportional to 10.45, 14.40 and 6.81 is: 9.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.45 : 14.40 = 6.81 : x
  2. Step 2: Convert to fraction form
    10.45/14.40 = 6.81/x
  3. Step 3: Cross multiply
    10.45x = 14.40 × 6.81
  4. Step 4: Simplify right side
    10.45x = 98.07
  5. Step 5: Solve for x
    x = 98.07/10.45
  6. Step 6: Final answer
    x = 9.38

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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.