Home / 6,820.44-9,412.18-3,989.76

Finding the Fourth Proportional to 6,820.44, 9,412.18 and 3,989.76

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Solution

The fourth proportional to 6,820.44, 9,412.18 and 3,989.76 is: 5,505.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,820.44 : 9,412.18 = 3,989.76 : x
  2. Step 2: Convert to fraction form
    6,820.44/9,412.18 = 3,989.76/x
  3. Step 3: Cross multiply
    6,820.44x = 9,412.18 × 3,989.76
  4. Step 4: Simplify right side
    6,820.44x = 37,552,339.28
  5. Step 5: Solve for x
    x = 37,552,339.28/6,820.44
  6. Step 6: Final answer
    x = 5,505.85

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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.