Home / 7,131.20-10,675.20-5,187.20

Finding the Fourth Proportional to 7,131.20, 10,675.20 and 5,187.20

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Solution

The fourth proportional to 7,131.20, 10,675.20 and 5,187.20 is: 7,765.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.20 : 10,675.20 = 5,187.20 : x
  2. Step 2: Convert to fraction form
    7,131.20/10,675.20 = 5,187.20/x
  3. Step 3: Cross multiply
    7,131.20x = 10,675.20 × 5,187.20
  4. Step 4: Simplify right side
    7,131.20x = 55,374,397.44
  5. Step 5: Solve for x
    x = 55,374,397.44/7,131.20
  6. Step 6: Final answer
    x = 7,765.09

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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.