Home / 7,128.45-9,834.75-4,143.60

Finding the Fourth Proportional to 7,128.45, 9,834.75 and 4,143.60

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Solution

The fourth proportional to 7,128.45, 9,834.75 and 4,143.60 is: 5,716.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.45 : 9,834.75 = 4,143.60 : x
  2. Step 2: Convert to fraction form
    7,128.45/9,834.75 = 4,143.60/x
  3. Step 3: Cross multiply
    7,128.45x = 9,834.75 × 4,143.60
  4. Step 4: Simplify right side
    7,128.45x = 40,751,270.10
  5. Step 5: Solve for x
    x = 40,751,270.10/7,128.45
  6. Step 6: Final answer
    x = 5,716.71

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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.