Home / 5,138.26-7,090.79-2,900.15

Finding the Fourth Proportional to 5,138.26, 7,090.79 and 2,900.15

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Solution

The fourth proportional to 5,138.26, 7,090.79 and 2,900.15 is: 4,002.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.26 : 7,090.79 = 2,900.15 : x
  2. Step 2: Convert to fraction form
    5,138.26/7,090.79 = 2,900.15/x
  3. Step 3: Cross multiply
    5,138.26x = 7,090.79 × 2,900.15
  4. Step 4: Simplify right side
    5,138.26x = 20,564,379.60
  5. Step 5: Solve for x
    x = 20,564,379.60/5,138.26
  6. Step 6: Final answer
    x = 4,002.21

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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.