Home / 3,921.31-5,411.31-2,153.08

Finding the Fourth Proportional to 3,921.31, 5,411.31 and 2,153.08

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Solution

The fourth proportional to 3,921.31, 5,411.31 and 2,153.08 is: 2,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.31 : 5,411.31 = 2,153.08 : x
  2. Step 2: Convert to fraction form
    3,921.31/5,411.31 = 2,153.08/x
  3. Step 3: Cross multiply
    3,921.31x = 5,411.31 × 2,153.08
  4. Step 4: Simplify right side
    3,921.31x = 11,650,982.02
  5. Step 5: Solve for x
    x = 11,650,982.02/3,921.31
  6. Step 6: Final answer
    x = 2,971.20

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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.