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Finding the Fourth Proportional to 20,340.92, 30,516.03 and 7,861.07

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Solution

The fourth proportional to 20,340.92, 30,516.03 and 7,861.07 is: 11,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.92 : 30,516.03 = 7,861.07 : x
  2. Step 2: Convert to fraction form
    20,340.92/30,516.03 = 7,861.07/x
  3. Step 3: Cross multiply
    20,340.92x = 30,516.03 × 7,861.07
  4. Step 4: Simplify right side
    20,340.92x = 239,888,495.37
  5. Step 5: Solve for x
    x = 239,888,495.37/20,340.92
  6. Step 6: Final answer
    x = 11,793.40

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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.