Home / 3,911.93-5,398.55-2,143.60

Finding the Fourth Proportional to 3,911.93, 5,398.55 and 2,143.60

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Solution

The fourth proportional to 3,911.93, 5,398.55 and 2,143.60 is: 2,958.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.93 : 5,398.55 = 2,143.60 : x
  2. Step 2: Convert to fraction form
    3,911.93/5,398.55 = 2,143.60/x
  3. Step 3: Cross multiply
    3,911.93x = 5,398.55 × 2,143.60
  4. Step 4: Simplify right side
    3,911.93x = 11,572,315.60
  5. Step 5: Solve for x
    x = 11,572,315.60/3,911.93
  6. Step 6: Final answer
    x = 2,958.21

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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.