Home / 20,100.78-30,142.32-10,738.68

Finding the Fourth Proportional to 20,100.78, 30,142.32 and 10,738.68

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Solution

The fourth proportional to 20,100.78, 30,142.32 and 10,738.68 is: 16,103.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.78 : 30,142.32 = 10,738.68 : x
  2. Step 2: Convert to fraction form
    20,100.78/30,142.32 = 10,738.68/x
  3. Step 3: Cross multiply
    20,100.78x = 30,142.32 × 10,738.68
  4. Step 4: Simplify right side
    20,100.78x = 323,688,728.94
  5. Step 5: Solve for x
    x = 323,688,728.94/20,100.78
  6. Step 6: Final answer
    x = 16,103.29

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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.