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Finding the Fourth Proportional to 6,511.79, 9,770.72 and 3,879.23

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Solution

The fourth proportional to 6,511.79, 9,770.72 and 3,879.23 is: 5,820.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.79 : 9,770.72 = 3,879.23 : x
  2. Step 2: Convert to fraction form
    6,511.79/9,770.72 = 3,879.23/x
  3. Step 3: Cross multiply
    6,511.79x = 9,770.72 × 3,879.23
  4. Step 4: Simplify right side
    6,511.79x = 37,902,801.90
  5. Step 5: Solve for x
    x = 37,902,801.90/6,511.79
  6. Step 6: Final answer
    x = 5,820.65

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1.5x scale

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.