Home / 20,764.92-28,654.57-11,689.75

Finding the Fourth Proportional to 20,764.92, 28,654.57 and 11,689.75

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Solution

The fourth proportional to 20,764.92, 28,654.57 and 11,689.75 is: 16,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.92 : 28,654.57 = 11,689.75 : x
  2. Step 2: Convert to fraction form
    20,764.92/28,654.57 = 11,689.75/x
  3. Step 3: Cross multiply
    20,764.92x = 28,654.57 × 11,689.75
  4. Step 4: Simplify right side
    20,764.92x = 334,964,759.66
  5. Step 5: Solve for x
    x = 334,964,759.66/20,764.92
  6. Step 6: Final answer
    x = 16,131.28

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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.