Home / 12,486.92-18,732.18-5,091.80

Finding the Fourth Proportional to 12,486.92, 18,732.18 and 5,091.80

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Solution

The fourth proportional to 12,486.92, 18,732.18 and 5,091.80 is: 7,638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.92 : 18,732.18 = 5,091.80 : x
  2. Step 2: Convert to fraction form
    12,486.92/18,732.18 = 5,091.80/x
  3. Step 3: Cross multiply
    12,486.92x = 18,732.18 × 5,091.80
  4. Step 4: Simplify right side
    12,486.92x = 95,380,514.12
  5. Step 5: Solve for x
    x = 95,380,514.12/12,486.92
  6. Step 6: Final answer
    x = 7,638.43

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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.