Home / 6,431.20-9,630.60-4,778.80

Finding the Fourth Proportional to 6,431.20, 9,630.60 and 4,778.80

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Solution

The fourth proportional to 6,431.20, 9,630.60 and 4,778.80 is: 7,156.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.20 : 9,630.60 = 4,778.80 : x
  2. Step 2: Convert to fraction form
    6,431.20/9,630.60 = 4,778.80/x
  3. Step 3: Cross multiply
    6,431.20x = 9,630.60 × 4,778.80
  4. Step 4: Simplify right side
    6,431.20x = 46,022,711.28
  5. Step 5: Solve for x
    x = 46,022,711.28/6,431.20
  6. Step 6: Final answer
    x = 7,156.16

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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.