Home / 5,415.24-8,120.70-2,641.80

Finding the Fourth Proportional to 5,415.24, 8,120.70 and 2,641.80

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Solution

The fourth proportional to 5,415.24, 8,120.70 and 2,641.80 is: 3,961.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.24 : 8,120.70 = 2,641.80 : x
  2. Step 2: Convert to fraction form
    5,415.24/8,120.70 = 2,641.80/x
  3. Step 3: Cross multiply
    5,415.24x = 8,120.70 × 2,641.80
  4. Step 4: Simplify right side
    5,415.24x = 21,453,265.26
  5. Step 5: Solve for x
    x = 21,453,265.26/5,415.24
  6. Step 6: Final answer
    x = 3,961.65

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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.