Home / 8,128.20-11,216.78-4,543.20

Finding the Fourth Proportional to 8,128.20, 11,216.78 and 4,543.20

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Solution

The fourth proportional to 8,128.20, 11,216.78 and 4,543.20 is: 6,269.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.20 : 11,216.78 = 4,543.20 : x
  2. Step 2: Convert to fraction form
    8,128.20/11,216.78 = 4,543.20/x
  3. Step 3: Cross multiply
    8,128.20x = 11,216.78 × 4,543.20
  4. Step 4: Simplify right side
    8,128.20x = 50,960,074.90
  5. Step 5: Solve for x
    x = 50,960,074.90/8,128.20
  6. Step 6: Final answer
    x = 6,269.54

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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.