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Finding the Fourth Proportional to 30,481.81, 45,698.11 and 28,021.44

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Solution

The fourth proportional to 30,481.81, 45,698.11 and 28,021.44 is: 42,009.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.81 : 45,698.11 = 28,021.44 : x
  2. Step 2: Convert to fraction form
    30,481.81/45,698.11 = 28,021.44/x
  3. Step 3: Cross multiply
    30,481.81x = 45,698.11 × 28,021.44
  4. Step 4: Simplify right side
    30,481.81x = 1,280,526,618.99
  5. Step 5: Solve for x
    x = 1,280,526,618.99/30,481.81
  6. Step 6: Final answer
    x = 42,009.53

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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.