Home / 5,640.35-7,784.39-3,218.31

Finding the Fourth Proportional to 5,640.35, 7,784.39 and 3,218.31

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Solution

The fourth proportional to 5,640.35, 7,784.39 and 3,218.31 is: 4,441.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.35 : 7,784.39 = 3,218.31 : x
  2. Step 2: Convert to fraction form
    5,640.35/7,784.39 = 3,218.31/x
  3. Step 3: Cross multiply
    5,640.35x = 7,784.39 × 3,218.31
  4. Step 4: Simplify right side
    5,640.35x = 25,052,593.28
  5. Step 5: Solve for x
    x = 25,052,593.28/5,640.35
  6. Step 6: Final answer
    x = 4,441.67

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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.