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Finding the Fourth Proportional to 8.75, 13.12 and 6.50

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Solution

The fourth proportional to 8.75, 13.12 and 6.50 is: 9.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.75 : 13.12 = 6.50 : x
  2. Step 2: Convert to fraction form
    8.75/13.12 = 6.50/x
  3. Step 3: Cross multiply
    8.75x = 13.12 × 6.50
  4. Step 4: Simplify right side
    8.75x = 85.30
  5. Step 5: Solve for x
    x = 85.30/8.75
  6. Step 6: Final answer
    x = 9.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.