Home / 5,640.39-7,778.67-3,648.87

Finding the Fourth Proportional to 5,640.39, 7,778.67 and 3,648.87

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Solution

The fourth proportional to 5,640.39, 7,778.67 and 3,648.87 is: 5,032.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.39 : 7,778.67 = 3,648.87 : x
  2. Step 2: Convert to fraction form
    5,640.39/7,778.67 = 3,648.87/x
  3. Step 3: Cross multiply
    5,640.39x = 7,778.67 × 3,648.87
  4. Step 4: Simplify right side
    5,640.39x = 28,383,355.60
  5. Step 5: Solve for x
    x = 28,383,355.60/5,640.39
  6. Step 6: Final answer
    x = 5,032.16

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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.