Home / 20,154.20-30,231.30-7,842.20

Finding the Fourth Proportional to 20,154.20, 30,231.30 and 7,842.20

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Solution

The fourth proportional to 20,154.20, 30,231.30 and 7,842.20 is: 11,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,154.20 : 30,231.30 = 7,842.20 : x
  2. Step 2: Convert to fraction form
    20,154.20/30,231.30 = 7,842.20/x
  3. Step 3: Cross multiply
    20,154.20x = 30,231.30 × 7,842.20
  4. Step 4: Simplify right side
    20,154.20x = 237,079,900.86
  5. Step 5: Solve for x
    x = 237,079,900.86/20,154.20
  6. Step 6: Final answer
    x = 11,763.30

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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.