Home / 3,987.72-5,491.44-3,102.03

Finding the Fourth Proportional to 3,987.72, 5,491.44 and 3,102.03

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Solution

The fourth proportional to 3,987.72, 5,491.44 and 3,102.03 is: 4,271.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.72 : 5,491.44 = 3,102.03 : x
  2. Step 2: Convert to fraction form
    3,987.72/5,491.44 = 3,102.03/x
  3. Step 3: Cross multiply
    3,987.72x = 5,491.44 × 3,102.03
  4. Step 4: Simplify right side
    3,987.72x = 17,034,611.62
  5. Step 5: Solve for x
    x = 17,034,611.62/3,987.72
  6. Step 6: Final answer
    x = 4,271.77

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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.