Home / 12,391.23-18,590.49-4,991.88

Finding the Fourth Proportional to 12,391.23, 18,590.49 and 4,991.88

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Solution

The fourth proportional to 12,391.23, 18,590.49 and 4,991.88 is: 7,489.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.23 : 18,590.49 = 4,991.88 : x
  2. Step 2: Convert to fraction form
    12,391.23/18,590.49 = 4,991.88/x
  3. Step 3: Cross multiply
    12,391.23x = 18,590.49 × 4,991.88
  4. Step 4: Simplify right side
    12,391.23x = 92,801,495.22
  5. Step 5: Solve for x
    x = 92,801,495.22/12,391.23
  6. Step 6: Final answer
    x = 7,489.29

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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.