Home / 3,909.34-5,394.84-2,231.28

Finding the Fourth Proportional to 3,909.34, 5,394.84 and 2,231.28

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Solution

The fourth proportional to 3,909.34, 5,394.84 and 2,231.28 is: 3,079.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.34 : 5,394.84 = 2,231.28 : x
  2. Step 2: Convert to fraction form
    3,909.34/5,394.84 = 2,231.28/x
  3. Step 3: Cross multiply
    3,909.34x = 5,394.84 × 2,231.28
  4. Step 4: Simplify right side
    3,909.34x = 12,037,390.23
  5. Step 5: Solve for x
    x = 12,037,390.23/3,909.34
  6. Step 6: Final answer
    x = 3,079.14

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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.