Home / 3,918.78-5,856.48-3,189.24

Finding the Fourth Proportional to 3,918.78, 5,856.48 and 3,189.24

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Solution

The fourth proportional to 3,918.78, 5,856.48 and 3,189.24 is: 4,766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.78 : 5,856.48 = 3,189.24 : x
  2. Step 2: Convert to fraction form
    3,918.78/5,856.48 = 3,189.24/x
  3. Step 3: Cross multiply
    3,918.78x = 5,856.48 × 3,189.24
  4. Step 4: Simplify right side
    3,918.78x = 18,677,720.28
  5. Step 5: Solve for x
    x = 18,677,720.28/3,918.78
  6. Step 6: Final answer
    x = 4,766.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.