Home / 5,120.85-7,684.21-2,159.09

Finding the Fourth Proportional to 5,120.85, 7,684.21 and 2,159.09

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Solution

The fourth proportional to 5,120.85, 7,684.21 and 2,159.09 is: 3,239.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.85 : 7,684.21 = 2,159.09 : x
  2. Step 2: Convert to fraction form
    5,120.85/7,684.21 = 2,159.09/x
  3. Step 3: Cross multiply
    5,120.85x = 7,684.21 × 2,159.09
  4. Step 4: Simplify right side
    5,120.85x = 16,590,862.55
  5. Step 5: Solve for x
    x = 16,590,862.55/5,120.85
  6. Step 6: Final answer
    x = 3,239.86

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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.