Home / 12,642.89-18,964.63-3,877.88

Finding the Fourth Proportional to 12,642.89, 18,964.63 and 3,877.88

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Solution

The fourth proportional to 12,642.89, 18,964.63 and 3,877.88 is: 5,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.89 : 18,964.63 = 3,877.88 : x
  2. Step 2: Convert to fraction form
    12,642.89/18,964.63 = 3,877.88/x
  3. Step 3: Cross multiply
    12,642.89x = 18,964.63 × 3,877.88
  4. Step 4: Simplify right side
    12,642.89x = 73,542,469.41
  5. Step 5: Solve for x
    x = 73,542,469.41/12,642.89
  6. Step 6: Final answer
    x = 5,816.91

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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.