Home / 20,105.78-30,161.22-7,630.16

Finding the Fourth Proportional to 20,105.78, 30,161.22 and 7,630.16

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Solution

The fourth proportional to 20,105.78, 30,161.22 and 7,630.16 is: 11,446.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.78 : 30,161.22 = 7,630.16 : x
  2. Step 2: Convert to fraction form
    20,105.78/30,161.22 = 7,630.16/x
  3. Step 3: Cross multiply
    20,105.78x = 30,161.22 × 7,630.16
  4. Step 4: Simplify right side
    20,105.78x = 230,134,934.40
  5. Step 5: Solve for x
    x = 230,134,934.40/20,105.78
  6. Step 6: Final answer
    x = 11,446.21

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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.