Home / 5,515.20-8,259.84-4,272.72

Finding the Fourth Proportional to 5,515.20, 8,259.84 and 4,272.72

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Solution

The fourth proportional to 5,515.20, 8,259.84 and 4,272.72 is: 6,399.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515.20 : 8,259.84 = 4,272.72 : x
  2. Step 2: Convert to fraction form
    5,515.20/8,259.84 = 4,272.72/x
  3. Step 3: Cross multiply
    5,515.20x = 8,259.84 × 4,272.72
  4. Step 4: Simplify right side
    5,515.20x = 35,291,983.56
  5. Step 5: Solve for x
    x = 35,291,983.56/5,515.20
  6. Step 6: Final answer
    x = 6,399.04

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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.