Home / 3,911.25-5,397.63-2,143.02

Finding the Fourth Proportional to 3,911.25, 5,397.63 and 2,143.02

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Solution

The fourth proportional to 3,911.25, 5,397.63 and 2,143.02 is: 2,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.25 : 5,397.63 = 2,143.02 : x
  2. Step 2: Convert to fraction form
    3,911.25/5,397.63 = 2,143.02/x
  3. Step 3: Cross multiply
    3,911.25x = 5,397.63 × 2,143.02
  4. Step 4: Simplify right side
    3,911.25x = 11,567,229.04
  5. Step 5: Solve for x
    x = 11,567,229.04/3,911.25
  6. Step 6: Final answer
    x = 2,957.43

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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.