Home / 6,404.20-9,611.70-3,120.10

Finding the Fourth Proportional to 6,404.20, 9,611.70 and 3,120.10

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Solution

The fourth proportional to 6,404.20, 9,611.70 and 3,120.10 is: 4,682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,404.20 : 9,611.70 = 3,120.10 : x
  2. Step 2: Convert to fraction form
    6,404.20/9,611.70 = 3,120.10/x
  3. Step 3: Cross multiply
    6,404.20x = 9,611.70 × 3,120.10
  4. Step 4: Simplify right side
    6,404.20x = 29,989,465.17
  5. Step 5: Solve for x
    x = 29,989,465.17/6,404.20
  6. Step 6: Final answer
    x = 4,682.78

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1.5x scale

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.