Home / 20,129.63-30,175.97-6,972.80

Finding the Fourth Proportional to 20,129.63, 30,175.97 and 6,972.80

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Solution

The fourth proportional to 20,129.63, 30,175.97 and 6,972.80 is: 10,452.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.63 : 30,175.97 = 6,972.80 : x
  2. Step 2: Convert to fraction form
    20,129.63/30,175.97 = 6,972.80/x
  3. Step 3: Cross multiply
    20,129.63x = 30,175.97 × 6,972.80
  4. Step 4: Simplify right side
    20,129.63x = 210,410,817.87
  5. Step 5: Solve for x
    x = 210,410,817.87/20,129.63
  6. Step 6: Final answer
    x = 10,452.79

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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.