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Finding the Fourth Proportional to 20,439.01, 30,660.51 and 7,960.06

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Solution

The fourth proportional to 20,439.01, 30,660.51 and 7,960.06 is: 11,940.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.01 : 30,660.51 = 7,960.06 : x
  2. Step 2: Convert to fraction form
    20,439.01/30,660.51 = 7,960.06/x
  3. Step 3: Cross multiply
    20,439.01x = 30,660.51 × 7,960.06
  4. Step 4: Simplify right side
    20,439.01x = 244,059,499.23
  5. Step 5: Solve for x
    x = 244,059,499.23/20,439.01
  6. Step 6: Final answer
    x = 11,940.87

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Double scale
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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.