Home / 3,921.38-5,411.52-2,153.10

Finding the Fourth Proportional to 3,921.38, 5,411.52 and 2,153.10

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Solution

The fourth proportional to 3,921.38, 5,411.52 and 2,153.10 is: 2,971.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.38 : 5,411.52 = 2,153.10 : x
  2. Step 2: Convert to fraction form
    3,921.38/5,411.52 = 2,153.10/x
  3. Step 3: Cross multiply
    3,921.38x = 5,411.52 × 2,153.10
  4. Step 4: Simplify right side
    3,921.38x = 11,651,535.64
  5. Step 5: Solve for x
    x = 11,651,535.64/3,921.38
  6. Step 6: Final answer
    x = 2,971.28

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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.