Home / 20,160.96-27,811.16-12,879.44

Finding the Fourth Proportional to 20,160.96, 27,811.16 and 12,879.44

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Solution

The fourth proportional to 20,160.96, 27,811.16 and 12,879.44 is: 17,766.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.96 : 27,811.16 = 12,879.44 : x
  2. Step 2: Convert to fraction form
    20,160.96/27,811.16 = 12,879.44/x
  3. Step 3: Cross multiply
    20,160.96x = 27,811.16 × 12,879.44
  4. Step 4: Simplify right side
    20,160.96x = 358,192,166.55
  5. Step 5: Solve for x
    x = 358,192,166.55/20,160.96
  6. Step 6: Final answer
    x = 17,766.62

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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.