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Finding the Fourth Proportional to 6,990.96, 9,638.12 and 5,991.92

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Solution

The fourth proportional to 6,990.96, 9,638.12 and 5,991.92 is: 8,260.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.96 : 9,638.12 = 5,991.92 : x
  2. Step 2: Convert to fraction form
    6,990.96/9,638.12 = 5,991.92/x
  3. Step 3: Cross multiply
    6,990.96x = 9,638.12 × 5,991.92
  4. Step 4: Simplify right side
    6,990.96x = 57,750,843.99
  5. Step 5: Solve for x
    x = 57,750,843.99/6,990.96
  6. Step 6: Final answer
    x = 8,260.79

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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.