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Finding the Fourth Proportional to 20,610.30, 30,905.10 and 10,081.12

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Solution

The fourth proportional to 20,610.30, 30,905.10 and 10,081.12 is: 15,116.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.30 : 30,905.10 = 10,081.12 : x
  2. Step 2: Convert to fraction form
    20,610.30/30,905.10 = 10,081.12/x
  3. Step 3: Cross multiply
    20,610.30x = 30,905.10 × 10,081.12
  4. Step 4: Simplify right side
    20,610.30x = 311,558,021.71
  5. Step 5: Solve for x
    x = 311,558,021.71/20,610.30
  6. Step 6: Final answer
    x = 15,116.62

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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.