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Finding the Fourth Proportional to 30,489.99, 45,739.23 and 9,431.73

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Solution

The fourth proportional to 30,489.99, 45,739.23 and 9,431.73 is: 14,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,489.99 : 45,739.23 = 9,431.73 : x
  2. Step 2: Convert to fraction form
    30,489.99/45,739.23 = 9,431.73/x
  3. Step 3: Cross multiply
    30,489.99x = 45,739.23 × 9,431.73
  4. Step 4: Simplify right side
    30,489.99x = 431,400,067.77
  5. Step 5: Solve for x
    x = 431,400,067.77/30,489.99
  6. Step 6: Final answer
    x = 14,148.91

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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.