Home / 5,540.40-8,320.20-3,908.40

Finding the Fourth Proportional to 5,540.40, 8,320.20 and 3,908.40

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Solution

The fourth proportional to 5,540.40, 8,320.20 and 3,908.40 is: 5,869.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,540.40 : 8,320.20 = 3,908.40 : x
  2. Step 2: Convert to fraction form
    5,540.40/8,320.20 = 3,908.40/x
  3. Step 3: Cross multiply
    5,540.40x = 8,320.20 × 3,908.40
  4. Step 4: Simplify right side
    5,540.40x = 32,518,669.68
  5. Step 5: Solve for x
    x = 32,518,669.68/5,540.40
  6. Step 6: Final answer
    x = 5,869.37

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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.