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Finding the Fourth Proportional to 8.71, 12.02 and 8.30

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Solution

The fourth proportional to 8.71, 12.02 and 8.30 is: 11.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.71 : 12.02 = 8.30 : x
  2. Step 2: Convert to fraction form
    8.71/12.02 = 8.30/x
  3. Step 3: Cross multiply
    8.71x = 12.02 × 8.30
  4. Step 4: Simplify right side
    8.71x = 99.75
  5. Step 5: Solve for x
    x = 99.75/8.71
  6. Step 6: Final answer
    x = 11.46

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.