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Finding the Fourth Proportional to 20,616.76, 30,906.76 and 10,081.08

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Solution

The fourth proportional to 20,616.76, 30,906.76 and 10,081.08 is: 15,112.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.76 : 30,906.76 = 10,081.08 : x
  2. Step 2: Convert to fraction form
    20,616.76/30,906.76 = 10,081.08/x
  3. Step 3: Cross multiply
    20,616.76x = 30,906.76 × 10,081.08
  4. Step 4: Simplify right side
    20,616.76x = 311,573,520.10
  5. Step 5: Solve for x
    x = 311,573,520.10/20,616.76
  6. Step 6: Final answer
    x = 15,112.63

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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.