Home / 20,139.40-27,793.70-12,181.96

Finding the Fourth Proportional to 20,139.40, 27,793.70 and 12,181.96

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Solution

The fourth proportional to 20,139.40, 27,793.70 and 12,181.96 is: 16,811.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.40 : 27,793.70 = 12,181.96 : x
  2. Step 2: Convert to fraction form
    20,139.40/27,793.70 = 12,181.96/x
  3. Step 3: Cross multiply
    20,139.40x = 27,793.70 × 12,181.96
  4. Step 4: Simplify right side
    20,139.40x = 338,581,741.65
  5. Step 5: Solve for x
    x = 338,581,741.65/20,139.40
  6. Step 6: Final answer
    x = 16,811.91

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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.