Home / 6,421.70-9,622.20-3,640.10

Finding the Fourth Proportional to 6,421.70, 9,622.20 and 3,640.10

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Solution

The fourth proportional to 6,421.70, 9,622.20 and 3,640.10 is: 5,454.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.70 : 9,622.20 = 3,640.10 : x
  2. Step 2: Convert to fraction form
    6,421.70/9,622.20 = 3,640.10/x
  3. Step 3: Cross multiply
    6,421.70x = 9,622.20 × 3,640.10
  4. Step 4: Simplify right side
    6,421.70x = 35,025,770.22
  5. Step 5: Solve for x
    x = 35,025,770.22/6,421.70
  6. Step 6: Final answer
    x = 5,454.28

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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.