Home / 20,115.20-30,172.80-6,966.20

Finding the Fourth Proportional to 20,115.20, 30,172.80 and 6,966.20

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Solution

The fourth proportional to 20,115.20, 30,172.80 and 6,966.20 is: 10,449.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.20 : 30,172.80 = 6,966.20 : x
  2. Step 2: Convert to fraction form
    20,115.20/30,172.80 = 6,966.20/x
  3. Step 3: Cross multiply
    20,115.20x = 30,172.80 × 6,966.20
  4. Step 4: Simplify right side
    20,115.20x = 210,189,759.36
  5. Step 5: Solve for x
    x = 210,189,759.36/20,115.20
  6. Step 6: Final answer
    x = 10,449.30

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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.