Home / 5,215.75-7,197.74-3,120.37

Finding the Fourth Proportional to 5,215.75, 7,197.74 and 3,120.37

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Solution

The fourth proportional to 5,215.75, 7,197.74 and 3,120.37 is: 4,306.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.75 : 7,197.74 = 3,120.37 : x
  2. Step 2: Convert to fraction form
    5,215.75/7,197.74 = 3,120.37/x
  3. Step 3: Cross multiply
    5,215.75x = 7,197.74 × 3,120.37
  4. Step 4: Simplify right side
    5,215.75x = 22,459,611.96
  5. Step 5: Solve for x
    x = 22,459,611.96/5,215.75
  6. Step 6: Final answer
    x = 4,306.11

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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.