Home / 12,144.48-18,181.68-7,131.66

Finding the Fourth Proportional to 12,144.48, 18,181.68 and 7,131.66

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Solution

The fourth proportional to 12,144.48, 18,181.68 and 7,131.66 is: 10,676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,144.48 : 18,181.68 = 7,131.66 : x
  2. Step 2: Convert to fraction form
    12,144.48/18,181.68 = 7,131.66/x
  3. Step 3: Cross multiply
    12,144.48x = 18,181.68 × 7,131.66
  4. Step 4: Simplify right side
    12,144.48x = 129,665,559.99
  5. Step 5: Solve for x
    x = 129,665,559.99/12,144.48
  6. Step 6: Final answer
    x = 10,676.91

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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.