Home / 5,215.20-7,198.26-3,539.40

Finding the Fourth Proportional to 5,215.20, 7,198.26 and 3,539.40

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Solution

The fourth proportional to 5,215.20, 7,198.26 and 3,539.40 is: 4,885.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.20 : 7,198.26 = 3,539.40 : x
  2. Step 2: Convert to fraction form
    5,215.20/7,198.26 = 3,539.40/x
  3. Step 3: Cross multiply
    5,215.20x = 7,198.26 × 3,539.40
  4. Step 4: Simplify right side
    5,215.20x = 25,477,521.44
  5. Step 5: Solve for x
    x = 25,477,521.44/5,215.20
  6. Step 6: Final answer
    x = 4,885.24

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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.