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Finding the Fourth Proportional to 30,481.76, 45,704.20 and 19,939.12

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Solution

The fourth proportional to 30,481.76, 45,704.20 and 19,939.12 is: 29,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.76 : 45,704.20 = 19,939.12 : x
  2. Step 2: Convert to fraction form
    30,481.76/45,704.20 = 19,939.12/x
  3. Step 3: Cross multiply
    30,481.76x = 45,704.20 × 19,939.12
  4. Step 4: Simplify right side
    30,481.76x = 911,301,528.30
  5. Step 5: Solve for x
    x = 911,301,528.30/30,481.76
  6. Step 6: Final answer
    x = 29,896.62

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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.