Home / 5,115.21-7,059.09-2,990.82

Finding the Fourth Proportional to 5,115.21, 7,059.09 and 2,990.82

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Solution

The fourth proportional to 5,115.21, 7,059.09 and 2,990.82 is: 4,127.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.21 : 7,059.09 = 2,990.82 : x
  2. Step 2: Convert to fraction form
    5,115.21/7,059.09 = 2,990.82/x
  3. Step 3: Cross multiply
    5,115.21x = 7,059.09 × 2,990.82
  4. Step 4: Simplify right side
    5,115.21x = 21,112,467.55
  5. Step 5: Solve for x
    x = 21,112,467.55/5,115.21
  6. Step 6: Final answer
    x = 4,127.39

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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.