Home / 5,311.30-7,961.55-3,118.90

Finding the Fourth Proportional to 5,311.30, 7,961.55 and 3,118.90

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Solution

The fourth proportional to 5,311.30, 7,961.55 and 3,118.90 is: 4,675.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.30 : 7,961.55 = 3,118.90 : x
  2. Step 2: Convert to fraction form
    5,311.30/7,961.55 = 3,118.90/x
  3. Step 3: Cross multiply
    5,311.30x = 7,961.55 × 3,118.90
  4. Step 4: Simplify right side
    5,311.30x = 24,831,278.30
  5. Step 5: Solve for x
    x = 24,831,278.30/5,311.30
  6. Step 6: Final answer
    x = 4,675.18

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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.