Home / 20,129.15-30,193.63-17,139.76

Finding the Fourth Proportional to 20,129.15, 30,193.63 and 17,139.76

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Solution

The fourth proportional to 20,129.15, 30,193.63 and 17,139.76 is: 25,709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.15 : 30,193.63 = 17,139.76 : x
  2. Step 2: Convert to fraction form
    20,129.15/30,193.63 = 17,139.76/x
  3. Step 3: Cross multiply
    20,129.15x = 30,193.63 × 17,139.76
  4. Step 4: Simplify right side
    20,129.15x = 517,511,571.73
  5. Step 5: Solve for x
    x = 517,511,571.73/20,129.15
  6. Step 6: Final answer
    x = 25,709.56

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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.