Home / 5,128.50-7,676.10-2,659.80

Finding the Fourth Proportional to 5,128.50, 7,676.10 and 2,659.80

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Solution

The fourth proportional to 5,128.50, 7,676.10 and 2,659.80 is: 3,981.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.50 : 7,676.10 = 2,659.80 : x
  2. Step 2: Convert to fraction form
    5,128.50/7,676.10 = 2,659.80/x
  3. Step 3: Cross multiply
    5,128.50x = 7,676.10 × 2,659.80
  4. Step 4: Simplify right side
    5,128.50x = 20,416,890.78
  5. Step 5: Solve for x
    x = 20,416,890.78/5,128.50
  6. Step 6: Final answer
    x = 3,981.06

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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.