Home / 5,129.47-7,078.67-2,771.61

Finding the Fourth Proportional to 5,129.47, 7,078.67 and 2,771.61

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Solution

The fourth proportional to 5,129.47, 7,078.67 and 2,771.61 is: 3,824.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.47 : 7,078.67 = 2,771.61 : x
  2. Step 2: Convert to fraction form
    5,129.47/7,078.67 = 2,771.61/x
  3. Step 3: Cross multiply
    5,129.47x = 7,078.67 × 2,771.61
  4. Step 4: Simplify right side
    5,129.47x = 19,619,298.70
  5. Step 5: Solve for x
    x = 19,619,298.70/5,129.47
  6. Step 6: Final answer
    x = 3,824.82

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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.