Home / 20,896.05-31,371.90-12,137.25

Finding the Fourth Proportional to 20,896.05, 31,371.90 and 12,137.25

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Solution

The fourth proportional to 20,896.05, 31,371.90 and 12,137.25 is: 18,222.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.05 : 31,371.90 = 12,137.25 : x
  2. Step 2: Convert to fraction form
    20,896.05/31,371.90 = 12,137.25/x
  3. Step 3: Cross multiply
    20,896.05x = 31,371.90 × 12,137.25
  4. Step 4: Simplify right side
    20,896.05x = 380,768,593.28
  5. Step 5: Solve for x
    x = 380,768,593.28/20,896.05
  6. Step 6: Final answer
    x = 18,222.04

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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.