Home / 20,842.46-28,759.89-11,889.43

Finding the Fourth Proportional to 20,842.46, 28,759.89 and 11,889.43

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Solution

The fourth proportional to 20,842.46, 28,759.89 and 11,889.43 is: 16,405.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.46 : 28,759.89 = 11,889.43 : x
  2. Step 2: Convert to fraction form
    20,842.46/28,759.89 = 11,889.43/x
  3. Step 3: Cross multiply
    20,842.46x = 28,759.89 × 11,889.43
  4. Step 4: Simplify right side
    20,842.46x = 341,938,525.44
  5. Step 5: Solve for x
    x = 341,938,525.44/20,842.46
  6. Step 6: Final answer
    x = 16,405.86

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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.