Home / 3,729.40-5,145.96-2,157.18

Finding the Fourth Proportional to 3,729.40, 5,145.96 and 2,157.18

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Solution

The fourth proportional to 3,729.40, 5,145.96 and 2,157.18 is: 2,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,729.40 : 5,145.96 = 2,157.18 : x
  2. Step 2: Convert to fraction form
    3,729.40/5,145.96 = 2,157.18/x
  3. Step 3: Cross multiply
    3,729.40x = 5,145.96 × 2,157.18
  4. Step 4: Simplify right side
    3,729.40x = 11,100,761.99
  5. Step 5: Solve for x
    x = 11,100,761.99/3,729.40
  6. Step 6: Final answer
    x = 2,976.55

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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.