Home / 20,766.42-28,657.66-11,815.66

Finding the Fourth Proportional to 20,766.42, 28,657.66 and 11,815.66

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Solution

The fourth proportional to 20,766.42, 28,657.66 and 11,815.66 is: 16,305.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.42 : 28,657.66 = 11,815.66 : x
  2. Step 2: Convert to fraction form
    20,766.42/28,657.66 = 11,815.66/x
  3. Step 3: Cross multiply
    20,766.42x = 28,657.66 × 11,815.66
  4. Step 4: Simplify right side
    20,766.42x = 338,609,166.96
  5. Step 5: Solve for x
    x = 338,609,166.96/20,766.42
  6. Step 6: Final answer
    x = 16,305.61

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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.