Home / 7,131.26-9,841.20-3,987.44

Finding the Fourth Proportional to 7,131.26, 9,841.20 and 3,987.44

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Solution

The fourth proportional to 7,131.26, 9,841.20 and 3,987.44 is: 5,502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.26 : 9,841.20 = 3,987.44 : x
  2. Step 2: Convert to fraction form
    7,131.26/9,841.20 = 3,987.44/x
  3. Step 3: Cross multiply
    7,131.26x = 9,841.20 × 3,987.44
  4. Step 4: Simplify right side
    7,131.26x = 39,241,222.63
  5. Step 5: Solve for x
    x = 39,241,222.63/7,131.26
  6. Step 6: Final answer
    x = 5,502.71

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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.