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Finding the Fourth Proportional to 20,640.24, 30,960.02 and 6,600.11

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Solution

The fourth proportional to 20,640.24, 30,960.02 and 6,600.11 is: 9,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.24 : 30,960.02 = 6,600.11 : x
  2. Step 2: Convert to fraction form
    20,640.24/30,960.02 = 6,600.11/x
  3. Step 3: Cross multiply
    20,640.24x = 30,960.02 × 6,600.11
  4. Step 4: Simplify right side
    20,640.24x = 204,339,349.80
  5. Step 5: Solve for x
    x = 204,339,349.80/20,640.24
  6. Step 6: Final answer
    x = 9,900.05

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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.