Home / 3,921.96-5,412.34-2,153.60

Finding the Fourth Proportional to 3,921.96, 5,412.34 and 2,153.60

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Solution

The fourth proportional to 3,921.96, 5,412.34 and 2,153.60 is: 2,971.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.96 : 5,412.34 = 2,153.60 : x
  2. Step 2: Convert to fraction form
    3,921.96/5,412.34 = 2,153.60/x
  3. Step 3: Cross multiply
    3,921.96x = 5,412.34 × 2,153.60
  4. Step 4: Simplify right side
    3,921.96x = 11,656,047.85
  5. Step 5: Solve for x
    x = 11,656,047.85/3,921.96
  6. Step 6: Final answer
    x = 2,971.99

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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.