Home / 6,420.20-9,630.30-5,739.80

Finding the Fourth Proportional to 6,420.20, 9,630.30 and 5,739.80

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Solution

The fourth proportional to 6,420.20, 9,630.30 and 5,739.80 is: 8,609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.20 : 9,630.30 = 5,739.80 : x
  2. Step 2: Convert to fraction form
    6,420.20/9,630.30 = 5,739.80/x
  3. Step 3: Cross multiply
    6,420.20x = 9,630.30 × 5,739.80
  4. Step 4: Simplify right side
    6,420.20x = 55,275,995.94
  5. Step 5: Solve for x
    x = 55,275,995.94/6,420.20
  6. Step 6: Final answer
    x = 8,609.70

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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.