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Finding the Fourth Proportional to 8.40, 11.52 and 8.01

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Solution

The fourth proportional to 8.40, 11.52 and 8.01 is: 10.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.40 : 11.52 = 8.01 : x
  2. Step 2: Convert to fraction form
    8.40/11.52 = 8.01/x
  3. Step 3: Cross multiply
    8.40x = 11.52 × 8.01
  4. Step 4: Simplify right side
    8.40x = 92.28
  5. Step 5: Solve for x
    x = 92.28/8.40
  6. Step 6: Final answer
    x = 10.99

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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.