Home / 5,108.76-7,656.55-2,143.86

Finding the Fourth Proportional to 5,108.76, 7,656.55 and 2,143.86

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Solution

The fourth proportional to 5,108.76, 7,656.55 and 2,143.86 is: 3,213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.76 : 7,656.55 = 2,143.86 : x
  2. Step 2: Convert to fraction form
    5,108.76/7,656.55 = 2,143.86/x
  3. Step 3: Cross multiply
    5,108.76x = 7,656.55 × 2,143.86
  4. Step 4: Simplify right side
    5,108.76x = 16,414,560.56
  5. Step 5: Solve for x
    x = 16,414,560.56/5,108.76
  6. Step 6: Final answer
    x = 3,213.03

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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.