Home / 3,909.22-5,394.78-2,140.79

Finding the Fourth Proportional to 3,909.22, 5,394.78 and 2,140.79

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Solution

The fourth proportional to 3,909.22, 5,394.78 and 2,140.79 is: 2,954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.22 : 5,394.78 = 2,140.79 : x
  2. Step 2: Convert to fraction form
    3,909.22/5,394.78 = 2,140.79/x
  3. Step 3: Cross multiply
    3,909.22x = 5,394.78 × 2,140.79
  4. Step 4: Simplify right side
    3,909.22x = 11,549,091.08
  5. Step 5: Solve for x
    x = 11,549,091.08/3,909.22
  6. Step 6: Final answer
    x = 2,954.32

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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.