Home / 3,911.48-5,397.84-2,143.08

Finding the Fourth Proportional to 3,911.48, 5,397.84 and 2,143.08

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Solution

The fourth proportional to 3,911.48, 5,397.84 and 2,143.08 is: 2,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.48 : 5,397.84 = 2,143.08 : x
  2. Step 2: Convert to fraction form
    3,911.48/5,397.84 = 2,143.08/x
  3. Step 3: Cross multiply
    3,911.48x = 5,397.84 × 2,143.08
  4. Step 4: Simplify right side
    3,911.48x = 11,568,002.95
  5. Step 5: Solve for x
    x = 11,568,002.95/3,911.48
  6. Step 6: Final answer
    x = 2,957.45

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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.