Home / 5,415.12-8,119.74-2,781.54

Finding the Fourth Proportional to 5,415.12, 8,119.74 and 2,781.54

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Solution

The fourth proportional to 5,415.12, 8,119.74 and 2,781.54 is: 4,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.12 : 8,119.74 = 2,781.54 : x
  2. Step 2: Convert to fraction form
    5,415.12/8,119.74 = 2,781.54/x
  3. Step 3: Cross multiply
    5,415.12x = 8,119.74 × 2,781.54
  4. Step 4: Simplify right side
    5,415.12x = 22,585,381.60
  5. Step 5: Solve for x
    x = 22,585,381.60/5,415.12
  6. Step 6: Final answer
    x = 4,170.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.