Home / 3,729.68-5,146.80-2,157.60

Finding the Fourth Proportional to 3,729.68, 5,146.80 and 2,157.60

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Solution

The fourth proportional to 3,729.68, 5,146.80 and 2,157.60 is: 2,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,729.68 : 5,146.80 = 2,157.60 : x
  2. Step 2: Convert to fraction form
    3,729.68/5,146.80 = 2,157.60/x
  3. Step 3: Cross multiply
    3,729.68x = 5,146.80 × 2,157.60
  4. Step 4: Simplify right side
    3,729.68x = 11,104,735.68
  5. Step 5: Solve for x
    x = 11,104,735.68/3,729.68
  6. Step 6: Final answer
    x = 2,977.40

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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.