Home / 3,135.72-4,318.20-2,980.20

Finding the Fourth Proportional to 3,135.72, 4,318.20 and 2,980.20

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Solution

The fourth proportional to 3,135.72, 4,318.20 and 2,980.20 is: 4,104.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.72 : 4,318.20 = 2,980.20 : x
  2. Step 2: Convert to fraction form
    3,135.72/4,318.20 = 2,980.20/x
  3. Step 3: Cross multiply
    3,135.72x = 4,318.20 × 2,980.20
  4. Step 4: Simplify right side
    3,135.72x = 12,869,099.64
  5. Step 5: Solve for x
    x = 12,869,099.64/3,135.72
  6. Step 6: Final answer
    x = 4,104.03

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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.