Home / 5,181.20-7,147.88-3,191.12

Finding the Fourth Proportional to 5,181.20, 7,147.88 and 3,191.12

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Solution

The fourth proportional to 5,181.20, 7,147.88 and 3,191.12 is: 4,402.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.20 : 7,147.88 = 3,191.12 : x
  2. Step 2: Convert to fraction form
    5,181.20/7,147.88 = 3,191.12/x
  3. Step 3: Cross multiply
    5,181.20x = 7,147.88 × 3,191.12
  4. Step 4: Simplify right side
    5,181.20x = 22,809,742.83
  5. Step 5: Solve for x
    x = 22,809,742.83/5,181.20
  6. Step 6: Final answer
    x = 4,402.41

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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.