Home / 5,215.56-7,198.38-3,120.84

Finding the Fourth Proportional to 5,215.56, 7,198.38 and 3,120.84

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Solution

The fourth proportional to 5,215.56, 7,198.38 and 3,120.84 is: 4,307.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.56 : 7,198.38 = 3,120.84 : x
  2. Step 2: Convert to fraction form
    5,215.56/7,198.38 = 3,120.84/x
  3. Step 3: Cross multiply
    5,215.56x = 7,198.38 × 3,120.84
  4. Step 4: Simplify right side
    5,215.56x = 22,464,992.24
  5. Step 5: Solve for x
    x = 22,464,992.24/5,215.56
  6. Step 6: Final answer
    x = 4,307.30

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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.