Home / 5,128.01-7,076.70-2,889.68

Finding the Fourth Proportional to 5,128.01, 7,076.70 and 2,889.68

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Solution

The fourth proportional to 5,128.01, 7,076.70 and 2,889.68 is: 3,987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.01 : 7,076.70 = 2,889.68 : x
  2. Step 2: Convert to fraction form
    5,128.01/7,076.70 = 2,889.68/x
  3. Step 3: Cross multiply
    5,128.01x = 7,076.70 × 2,889.68
  4. Step 4: Simplify right side
    5,128.01x = 20,449,363.07
  5. Step 5: Solve for x
    x = 20,449,363.07/5,128.01
  6. Step 6: Final answer
    x = 3,987.78

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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.