Home / 5,405.72-8,105.09-2,119.15

Finding the Fourth Proportional to 5,405.72, 8,105.09 and 2,119.15

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Solution

The fourth proportional to 5,405.72, 8,105.09 and 2,119.15 is: 3,177.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.72 : 8,105.09 = 2,119.15 : x
  2. Step 2: Convert to fraction form
    5,405.72/8,105.09 = 2,119.15/x
  3. Step 3: Cross multiply
    5,405.72x = 8,105.09 × 2,119.15
  4. Step 4: Simplify right side
    5,405.72x = 17,175,870.62
  5. Step 5: Solve for x
    x = 17,175,870.62/5,405.72
  6. Step 6: Final answer
    x = 3,177.35

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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.