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Finding the Fourth Proportional to 30,625.92, 45,939.84 and 8,439.12

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Solution

The fourth proportional to 30,625.92, 45,939.84 and 8,439.12 is: 12,658.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,625.92 : 45,939.84 = 8,439.12 : x
  2. Step 2: Convert to fraction form
    30,625.92/45,939.84 = 8,439.12/x
  3. Step 3: Cross multiply
    30,625.92x = 45,939.84 × 8,439.12
  4. Step 4: Simplify right side
    30,625.92x = 387,691,822.54
  5. Step 5: Solve for x
    x = 387,691,822.54/30,625.92
  6. Step 6: Final answer
    x = 12,658.94

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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.