Home / 3,921.89-5,412.24-2,153.57

Finding the Fourth Proportional to 3,921.89, 5,412.24 and 2,153.57

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Solution

The fourth proportional to 3,921.89, 5,412.24 and 2,153.57 is: 2,971.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.89 : 5,412.24 = 2,153.57 : x
  2. Step 2: Convert to fraction form
    3,921.89/5,412.24 = 2,153.57/x
  3. Step 3: Cross multiply
    3,921.89x = 5,412.24 × 2,153.57
  4. Step 4: Simplify right side
    3,921.89x = 11,655,610.64
  5. Step 5: Solve for x
    x = 11,655,610.64/3,921.89
  6. Step 6: Final answer
    x = 2,971.94

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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.