Home / 6,406.20-8,840.40-3,611.70

Finding the Fourth Proportional to 6,406.20, 8,840.40 and 3,611.70

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Solution

The fourth proportional to 6,406.20, 8,840.40 and 3,611.70 is: 4,984.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,406.20 : 8,840.40 = 3,611.70 : x
  2. Step 2: Convert to fraction form
    6,406.20/8,840.40 = 3,611.70/x
  3. Step 3: Cross multiply
    6,406.20x = 8,840.40 × 3,611.70
  4. Step 4: Simplify right side
    6,406.20x = 31,928,872.68
  5. Step 5: Solve for x
    x = 31,928,872.68/6,406.20
  6. Step 6: Final answer
    x = 4,984.06

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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.