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Finding the Fourth Proportional to 6,912.77, 9,539.78 and 4,080.84

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Solution

The fourth proportional to 6,912.77, 9,539.78 and 4,080.84 is: 5,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,912.77 : 9,539.78 = 4,080.84 : x
  2. Step 2: Convert to fraction form
    6,912.77/9,539.78 = 4,080.84/x
  3. Step 3: Cross multiply
    6,912.77x = 9,539.78 × 4,080.84
  4. Step 4: Simplify right side
    6,912.77x = 38,930,326.02
  5. Step 5: Solve for x
    x = 38,930,326.02/6,912.77
  6. Step 6: Final answer
    x = 5,631.65

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1.5x scale

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.