Home / 5,396.40-8,085.28-4,212.78

Finding the Fourth Proportional to 5,396.40, 8,085.28 and 4,212.78

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Solution

The fourth proportional to 5,396.40, 8,085.28 and 4,212.78 is: 6,311.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,396.40 : 8,085.28 = 4,212.78 : x
  2. Step 2: Convert to fraction form
    5,396.40/8,085.28 = 4,212.78/x
  3. Step 3: Cross multiply
    5,396.40x = 8,085.28 × 4,212.78
  4. Step 4: Simplify right side
    5,396.40x = 34,061,505.88
  5. Step 5: Solve for x
    x = 34,061,505.88/5,396.40
  6. Step 6: Final answer
    x = 6,311.89

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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.