Home / 3,918.20-5,407.40-2,589.60

Finding the Fourth Proportional to 3,918.20, 5,407.40 and 2,589.60

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Solution

The fourth proportional to 3,918.20, 5,407.40 and 2,589.60 is: 3,573.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.20 : 5,407.40 = 2,589.60 : x
  2. Step 2: Convert to fraction form
    3,918.20/5,407.40 = 2,589.60/x
  3. Step 3: Cross multiply
    3,918.20x = 5,407.40 × 2,589.60
  4. Step 4: Simplify right side
    3,918.20x = 14,003,003.04
  5. Step 5: Solve for x
    x = 14,003,003.04/3,918.20
  6. Step 6: Final answer
    x = 3,573.84

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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.