Home / 20,896.55-31,372.65-12,137.75

Finding the Fourth Proportional to 20,896.55, 31,372.65 and 12,137.75

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Solution

The fourth proportional to 20,896.55, 31,372.65 and 12,137.75 is: 18,222.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.55 : 31,372.65 = 12,137.75 : x
  2. Step 2: Convert to fraction form
    20,896.55/31,372.65 = 12,137.75/x
  3. Step 3: Cross multiply
    20,896.55x = 31,372.65 × 12,137.75
  4. Step 4: Simplify right side
    20,896.55x = 380,793,382.54
  5. Step 5: Solve for x
    x = 380,793,382.54/20,896.55
  6. Step 6: Final answer
    x = 18,222.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.