Home / 12,309.91-18,466.58-3,987.97

Finding the Fourth Proportional to 12,309.91, 18,466.58 and 3,987.97

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Solution

The fourth proportional to 12,309.91, 18,466.58 and 3,987.97 is: 5,982.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.91 : 18,466.58 = 3,987.97 : x
  2. Step 2: Convert to fraction form
    12,309.91/18,466.58 = 3,987.97/x
  3. Step 3: Cross multiply
    12,309.91x = 18,466.58 × 3,987.97
  4. Step 4: Simplify right side
    12,309.91x = 73,644,130.85
  5. Step 5: Solve for x
    x = 73,644,130.85/12,309.91
  6. Step 6: Final answer
    x = 5,982.51

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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.