Home / 5,415.75-8,119.89-2,129.22

Finding the Fourth Proportional to 5,415.75, 8,119.89 and 2,129.22

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Solution

The fourth proportional to 5,415.75, 8,119.89 and 2,129.22 is: 3,192.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.75 : 8,119.89 = 2,129.22 : x
  2. Step 2: Convert to fraction form
    5,415.75/8,119.89 = 2,129.22/x
  3. Step 3: Cross multiply
    5,415.75x = 8,119.89 × 2,129.22
  4. Step 4: Simplify right side
    5,415.75x = 17,289,032.19
  5. Step 5: Solve for x
    x = 17,289,032.19/5,415.75
  6. Step 6: Final answer
    x = 3,192.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.