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Finding the Fourth Proportional to 30,481.58, 45,691.14 and 20,621.84

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Solution

The fourth proportional to 30,481.58, 45,691.14 and 20,621.84 is: 30,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.58 : 45,691.14 = 20,621.84 : x
  2. Step 2: Convert to fraction form
    30,481.58/45,691.14 = 20,621.84/x
  3. Step 3: Cross multiply
    30,481.58x = 45,691.14 × 20,621.84
  4. Step 4: Simplify right side
    30,481.58x = 942,235,378.50
  5. Step 5: Solve for x
    x = 942,235,378.50/30,481.58
  6. Step 6: Final answer
    x = 30,911.63

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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.