Home / 12,651.20-18,939.42-12,109.92

Finding the Fourth Proportional to 12,651.20, 18,939.42 and 12,109.92

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Solution

The fourth proportional to 12,651.20, 18,939.42 and 12,109.92 is: 18,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.20 : 18,939.42 = 12,109.92 : x
  2. Step 2: Convert to fraction form
    12,651.20/18,939.42 = 12,109.92/x
  3. Step 3: Cross multiply
    12,651.20x = 18,939.42 × 12,109.92
  4. Step 4: Simplify right side
    12,651.20x = 229,354,861.05
  5. Step 5: Solve for x
    x = 229,354,861.05/12,651.20
  6. Step 6: Final answer
    x = 18,129.10

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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.