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Finding the Fourth Proportional to 8.31, 11.46 and 5.07

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Solution

The fourth proportional to 8.31, 11.46 and 5.07 is: 6.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.31 : 11.46 = 5.07 : x
  2. Step 2: Convert to fraction form
    8.31/11.46 = 5.07/x
  3. Step 3: Cross multiply
    8.31x = 11.46 × 5.07
  4. Step 4: Simplify right side
    8.31x = 58.10
  5. Step 5: Solve for x
    x = 58.10/8.31
  6. Step 6: Final answer
    x = 6.99

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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.