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Finding the Fourth Proportional to 30,249.91, 45,374.91 and 11,781.91

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Solution

The fourth proportional to 30,249.91, 45,374.91 and 11,781.91 is: 17,672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,249.91 : 45,374.91 = 11,781.91 : x
  2. Step 2: Convert to fraction form
    30,249.91/45,374.91 = 11,781.91/x
  3. Step 3: Cross multiply
    30,249.91x = 45,374.91 × 11,781.91
  4. Step 4: Simplify right side
    30,249.91x = 534,603,105.88
  5. Step 5: Solve for x
    x = 534,603,105.88/30,249.91
  6. Step 6: Final answer
    x = 17,672.88

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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.