Home / 7,131.56-9,841.39-3,987.75

Finding the Fourth Proportional to 7,131.56, 9,841.39 and 3,987.75

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Solution

The fourth proportional to 7,131.56, 9,841.39 and 3,987.75 is: 5,503.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.56 : 9,841.39 = 3,987.75 : x
  2. Step 2: Convert to fraction form
    7,131.56/9,841.39 = 3,987.75/x
  3. Step 3: Cross multiply
    7,131.56x = 9,841.39 × 3,987.75
  4. Step 4: Simplify right side
    7,131.56x = 39,245,002.97
  5. Step 5: Solve for x
    x = 39,245,002.97/7,131.56
  6. Step 6: Final answer
    x = 5,503.00

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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.