Home / 7,131.44-9,841.20-3,987.92

Finding the Fourth Proportional to 7,131.44, 9,841.20 and 3,987.92

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Solution

The fourth proportional to 7,131.44, 9,841.20 and 3,987.92 is: 5,503.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.44 : 9,841.20 = 3,987.92 : x
  2. Step 2: Convert to fraction form
    7,131.44/9,841.20 = 3,987.92/x
  3. Step 3: Cross multiply
    7,131.44x = 9,841.20 × 3,987.92
  4. Step 4: Simplify right side
    7,131.44x = 39,245,918.30
  5. Step 5: Solve for x
    x = 39,245,918.30/7,131.44
  6. Step 6: Final answer
    x = 5,503.22

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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.