Home / 20,230.20-30,330.90-7,745.40

Finding the Fourth Proportional to 20,230.20, 30,330.90 and 7,745.40

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Solution

The fourth proportional to 20,230.20, 30,330.90 and 7,745.40 is: 11,612.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,230.20 : 30,330.90 = 7,745.40 : x
  2. Step 2: Convert to fraction form
    20,230.20/30,330.90 = 7,745.40/x
  3. Step 3: Cross multiply
    20,230.20x = 30,330.90 × 7,745.40
  4. Step 4: Simplify right side
    20,230.20x = 234,924,952.86
  5. Step 5: Solve for x
    x = 234,924,952.86/20,230.20
  6. Step 6: Final answer
    x = 11,612.59

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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.