Home / 5,128.14-7,077.24-2,889.87

Finding the Fourth Proportional to 5,128.14, 7,077.24 and 2,889.87

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Solution

The fourth proportional to 5,128.14, 7,077.24 and 2,889.87 is: 3,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.14 : 7,077.24 = 2,889.87 : x
  2. Step 2: Convert to fraction form
    5,128.14/7,077.24 = 2,889.87/x
  3. Step 3: Cross multiply
    5,128.14x = 7,077.24 × 2,889.87
  4. Step 4: Simplify right side
    5,128.14x = 20,452,303.56
  5. Step 5: Solve for x
    x = 20,452,303.56/5,128.14
  6. Step 6: Final answer
    x = 3,988.25

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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.