Home / 3,781.44-5,220-2,540.16

Finding the Fourth Proportional to 3,781.44, 5,220 and 2,540.16

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Solution

The fourth proportional to 3,781.44, 5,220 and 2,540.16 is: 3,506.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.44 : 5,220 = 2,540.16 : x
  2. Step 2: Convert to fraction form
    3,781.44/5,220 = 2,540.16/x
  3. Step 3: Cross multiply
    3,781.44x = 5,220 × 2,540.16
  4. Step 4: Simplify right side
    3,781.44x = 13,259,635.20
  5. Step 5: Solve for x
    x = 13,259,635.20/3,781.44
  6. Step 6: Final answer
    x = 3,506.50

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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.