Home / 5,128.05-7,076.47-2,889.91

Finding the Fourth Proportional to 5,128.05, 7,076.47 and 2,889.91

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Solution

The fourth proportional to 5,128.05, 7,076.47 and 2,889.91 is: 3,987.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.05 : 7,076.47 = 2,889.91 : x
  2. Step 2: Convert to fraction form
    5,128.05/7,076.47 = 2,889.91/x
  3. Step 3: Cross multiply
    5,128.05x = 7,076.47 × 2,889.91
  4. Step 4: Simplify right side
    5,128.05x = 20,450,361.42
  5. Step 5: Solve for x
    x = 20,450,361.42/5,128.05
  6. Step 6: Final answer
    x = 3,987.94

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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.