Home / 20,817.45-28,729.94-11,863.08

Finding the Fourth Proportional to 20,817.45, 28,729.94 and 11,863.08

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Solution

The fourth proportional to 20,817.45, 28,729.94 and 11,863.08 is: 16,372.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.45 : 28,729.94 = 11,863.08 : x
  2. Step 2: Convert to fraction form
    20,817.45/28,729.94 = 11,863.08/x
  3. Step 3: Cross multiply
    20,817.45x = 28,729.94 × 11,863.08
  4. Step 4: Simplify right side
    20,817.45x = 340,825,517.30
  5. Step 5: Solve for x
    x = 340,825,517.30/20,817.45
  6. Step 6: Final answer
    x = 16,372.11

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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.