Home / 20,073.40-30,128.60-10,219.75

Finding the Fourth Proportional to 20,073.40, 30,128.60 and 10,219.75

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Solution

The fourth proportional to 20,073.40, 30,128.60 and 10,219.75 is: 15,339.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,073.40 : 30,128.60 = 10,219.75 : x
  2. Step 2: Convert to fraction form
    20,073.40/30,128.60 = 10,219.75/x
  3. Step 3: Cross multiply
    20,073.40x = 30,128.60 × 10,219.75
  4. Step 4: Simplify right side
    20,073.40x = 307,906,759.85
  5. Step 5: Solve for x
    x = 307,906,759.85/20,073.40
  6. Step 6: Final answer
    x = 15,339.04

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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.