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Finding the Fourth Proportional to 18,806.28, 28,179.74 and 6,943.72

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Solution

The fourth proportional to 18,806.28, 28,179.74 and 6,943.72 is: 10,404.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.28 : 28,179.74 = 6,943.72 : x
  2. Step 2: Convert to fraction form
    18,806.28/28,179.74 = 6,943.72/x
  3. Step 3: Cross multiply
    18,806.28x = 28,179.74 × 6,943.72
  4. Step 4: Simplify right side
    18,806.28x = 195,672,224.23
  5. Step 5: Solve for x
    x = 195,672,224.23/18,806.28
  6. Step 6: Final answer
    x = 10,404.62

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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.