Home / 3,911.90-5,399.38-2,655.06

Finding the Fourth Proportional to 3,911.90, 5,399.38 and 2,655.06

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Solution

The fourth proportional to 3,911.90, 5,399.38 and 2,655.06 is: 3,664.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.90 : 5,399.38 = 2,655.06 : x
  2. Step 2: Convert to fraction form
    3,911.90/5,399.38 = 2,655.06/x
  3. Step 3: Cross multiply
    3,911.90x = 5,399.38 × 2,655.06
  4. Step 4: Simplify right side
    3,911.90x = 14,335,677.86
  5. Step 5: Solve for x
    x = 14,335,677.86/3,911.90
  6. Step 6: Final answer
    x = 3,664.63

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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.