Home / 20,620.20-30,995.10-20,231.40

Finding the Fourth Proportional to 20,620.20, 30,995.10 and 20,231.40

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Solution

The fourth proportional to 20,620.20, 30,995.10 and 20,231.40 is: 30,410.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.20 : 30,995.10 = 20,231.40 : x
  2. Step 2: Convert to fraction form
    20,620.20/30,995.10 = 20,231.40/x
  3. Step 3: Cross multiply
    20,620.20x = 30,995.10 × 20,231.40
  4. Step 4: Simplify right side
    20,620.20x = 627,074,266.14
  5. Step 5: Solve for x
    x = 627,074,266.14/20,620.20
  6. Step 6: Final answer
    x = 30,410.68

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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.