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Finding the Fourth Proportional to 12,391.91, 18,582.99 and 4,994.99

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Solution

The fourth proportional to 12,391.91, 18,582.99 and 4,994.99 is: 7,490.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.91 : 18,582.99 = 4,994.99 : x
  2. Step 2: Convert to fraction form
    12,391.91/18,582.99 = 4,994.99/x
  3. Step 3: Cross multiply
    12,391.91x = 18,582.99 × 4,994.99
  4. Step 4: Simplify right side
    12,391.91x = 92,821,756.31
  5. Step 5: Solve for x
    x = 92,821,756.31/12,391.91
  6. Step 6: Final answer
    x = 7,490.52

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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.