Home / 5,128.07-7,072.71-3,711.97

Finding the Fourth Proportional to 5,128.07, 7,072.71 and 3,711.97

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Solution

The fourth proportional to 5,128.07, 7,072.71 and 3,711.97 is: 5,119.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.07 : 7,072.71 = 3,711.97 : x
  2. Step 2: Convert to fraction form
    5,128.07/7,072.71 = 3,711.97/x
  3. Step 3: Cross multiply
    5,128.07x = 7,072.71 × 3,711.97
  4. Step 4: Simplify right side
    5,128.07x = 26,253,651.98
  5. Step 5: Solve for x
    x = 26,253,651.98/5,128.07
  6. Step 6: Final answer
    x = 5,119.60

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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.