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Finding the Fourth Proportional to 8.50, 11.73 and 4.86

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Solution

The fourth proportional to 8.50, 11.73 and 4.86 is: 6.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.50 : 11.73 = 4.86 : x
  2. Step 2: Convert to fraction form
    8.50/11.73 = 4.86/x
  3. Step 3: Cross multiply
    8.50x = 11.73 × 4.86
  4. Step 4: Simplify right side
    8.50x = 56.95
  5. Step 5: Solve for x
    x = 56.95/8.50
  6. Step 6: Final answer
    x = 6.70

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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.