Home / 6,990.37-10,489.12-3,869.78

Finding the Fourth Proportional to 6,990.37, 10,489.12 and 3,869.78

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Solution

The fourth proportional to 6,990.37, 10,489.12 and 3,869.78 is: 5,806.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.37 : 10,489.12 = 3,869.78 : x
  2. Step 2: Convert to fraction form
    6,990.37/10,489.12 = 3,869.78/x
  3. Step 3: Cross multiply
    6,990.37x = 10,489.12 × 3,869.78
  4. Step 4: Simplify right side
    6,990.37x = 40,590,524.67
  5. Step 5: Solve for x
    x = 40,590,524.67/6,990.37
  6. Step 6: Final answer
    x = 5,806.64

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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.