Home / 3,921.80-5,415.54-3,735.08

Finding the Fourth Proportional to 3,921.80, 5,415.54 and 3,735.08

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Solution

The fourth proportional to 3,921.80, 5,415.54 and 3,735.08 is: 5,157.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.80 : 5,415.54 = 3,735.08 : x
  2. Step 2: Convert to fraction form
    3,921.80/5,415.54 = 3,735.08/x
  3. Step 3: Cross multiply
    3,921.80x = 5,415.54 × 3,735.08
  4. Step 4: Simplify right side
    3,921.80x = 20,227,475.14
  5. Step 5: Solve for x
    x = 20,227,475.14/3,921.80
  6. Step 6: Final answer
    x = 5,157.70

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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.