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Finding the Fourth Proportional to 30,443.58, 45,661.41 and 12,917.61

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Solution

The fourth proportional to 30,443.58, 45,661.41 and 12,917.61 is: 19,374.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,443.58 : 45,661.41 = 12,917.61 : x
  2. Step 2: Convert to fraction form
    30,443.58/45,661.41 = 12,917.61/x
  3. Step 3: Cross multiply
    30,443.58x = 45,661.41 × 12,917.61
  4. Step 4: Simplify right side
    30,443.58x = 589,836,286.43
  5. Step 5: Solve for x
    x = 589,836,286.43/30,443.58
  6. Step 6: Final answer
    x = 19,374.73

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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.