Home / 20,127.15-30,190.64-17,137.76

Finding the Fourth Proportional to 20,127.15, 30,190.64 and 17,137.76

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Solution

The fourth proportional to 20,127.15, 30,190.64 and 17,137.76 is: 25,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.15 : 30,190.64 = 17,137.76 : x
  2. Step 2: Convert to fraction form
    20,127.15/30,190.64 = 17,137.76/x
  3. Step 3: Cross multiply
    20,127.15x = 30,190.64 × 17,137.76
  4. Step 4: Simplify right side
    20,127.15x = 517,399,705.92
  5. Step 5: Solve for x
    x = 517,399,705.92/20,127.15
  6. Step 6: Final answer
    x = 25,706.56

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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.