Home / 5,181.12-7,145.28-3,781.44

Finding the Fourth Proportional to 5,181.12, 7,145.28 and 3,781.44

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Solution

The fourth proportional to 5,181.12, 7,145.28 and 3,781.44 is: 5,214.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.12 : 7,145.28 = 3,781.44 : x
  2. Step 2: Convert to fraction form
    5,181.12/7,145.28 = 3,781.44/x
  3. Step 3: Cross multiply
    5,181.12x = 7,145.28 × 3,781.44
  4. Step 4: Simplify right side
    5,181.12x = 27,019,447.60
  5. Step 5: Solve for x
    x = 27,019,447.60/5,181.12
  6. Step 6: Final answer
    x = 5,214.98

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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.