Home / 20,118.30-30,158.01-6,960.78

Finding the Fourth Proportional to 20,118.30, 30,158.01 and 6,960.78

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Solution

The fourth proportional to 20,118.30, 30,158.01 and 6,960.78 is: 10,434.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.30 : 30,158.01 = 6,960.78 : x
  2. Step 2: Convert to fraction form
    20,118.30/30,158.01 = 6,960.78/x
  3. Step 3: Cross multiply
    20,118.30x = 30,158.01 × 6,960.78
  4. Step 4: Simplify right side
    20,118.30x = 209,923,272.85
  5. Step 5: Solve for x
    x = 209,923,272.85/20,118.30
  6. Step 6: Final answer
    x = 10,434.44

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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.