Home / 5,129.46-7,078.65-2,771.60

Finding the Fourth Proportional to 5,129.46, 7,078.65 and 2,771.60

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Solution

The fourth proportional to 5,129.46, 7,078.65 and 2,771.60 is: 3,824.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.46 : 7,078.65 = 2,771.60 : x
  2. Step 2: Convert to fraction form
    5,129.46/7,078.65 = 2,771.60/x
  3. Step 3: Cross multiply
    5,129.46x = 7,078.65 × 2,771.60
  4. Step 4: Simplify right side
    5,129.46x = 19,619,140.55
  5. Step 5: Solve for x
    x = 19,619,140.55/5,129.46
  6. Step 6: Final answer
    x = 3,824.80

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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.