Home / 5,486.71-7,571.19-3,128.80

Finding the Fourth Proportional to 5,486.71, 7,571.19 and 3,128.80

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Solution

The fourth proportional to 5,486.71, 7,571.19 and 3,128.80 is: 4,317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,486.71 : 7,571.19 = 3,128.80 : x
  2. Step 2: Convert to fraction form
    5,486.71/7,571.19 = 3,128.80/x
  3. Step 3: Cross multiply
    5,486.71x = 7,571.19 × 3,128.80
  4. Step 4: Simplify right side
    5,486.71x = 23,688,739.27
  5. Step 5: Solve for x
    x = 23,688,739.27/5,486.71
  6. Step 6: Final answer
    x = 4,317.48

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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.