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Finding the Fourth Proportional to 8.36, 11.51 and 6.20

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Solution

The fourth proportional to 8.36, 11.51 and 6.20 is: 8.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.36 : 11.51 = 6.20 : x
  2. Step 2: Convert to fraction form
    8.36/11.51 = 6.20/x
  3. Step 3: Cross multiply
    8.36x = 11.51 × 6.20
  4. Step 4: Simplify right side
    8.36x = 71.27
  5. Step 5: Solve for x
    x = 71.27/8.36
  6. Step 6: Final answer
    x = 8.53

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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.