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Finding the Fourth Proportional to 20,438.01, 30,640.30 and 10,580.11

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Solution

The fourth proportional to 20,438.01, 30,640.30 and 10,580.11 is: 15,861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.01 : 30,640.30 = 10,580.11 : x
  2. Step 2: Convert to fraction form
    20,438.01/30,640.30 = 10,580.11/x
  3. Step 3: Cross multiply
    20,438.01x = 30,640.30 × 10,580.11
  4. Step 4: Simplify right side
    20,438.01x = 324,177,744.43
  5. Step 5: Solve for x
    x = 324,177,744.43/20,438.01
  6. Step 6: Final answer
    x = 15,861.51

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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.