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Finding the Fourth Proportional to 30,856, 46,286.16 and 12,388

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Solution

The fourth proportional to 30,856, 46,286.16 and 12,388 is: 18,582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,856 : 46,286.16 = 12,388 : x
  2. Step 2: Convert to fraction form
    30,856/46,286.16 = 12,388/x
  3. Step 3: Cross multiply
    30,856x = 46,286.16 × 12,388
  4. Step 4: Simplify right side
    30,856x = 573,392,950.08
  5. Step 5: Solve for x
    x = 573,392,950.08/30,856
  6. Step 6: Final answer
    x = 18,582.87

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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.