Home / 5,128.20-7,076.82-2,890.04

Finding the Fourth Proportional to 5,128.20, 7,076.82 and 2,890.04

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Solution

The fourth proportional to 5,128.20, 7,076.82 and 2,890.04 is: 3,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.20 : 7,076.82 = 2,890.04 : x
  2. Step 2: Convert to fraction form
    5,128.20/7,076.82 = 2,890.04/x
  3. Step 3: Cross multiply
    5,128.20x = 7,076.82 × 2,890.04
  4. Step 4: Simplify right side
    5,128.20x = 20,452,292.87
  5. Step 5: Solve for x
    x = 20,452,292.87/5,128.20
  6. Step 6: Final answer
    x = 3,988.20

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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.