Home / 12,642.96-18,968.16-3,758.36

Finding the Fourth Proportional to 12,642.96, 18,968.16 and 3,758.36

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Solution

The fourth proportional to 12,642.96, 18,968.16 and 3,758.36 is: 5,638.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.96 : 18,968.16 = 3,758.36 : x
  2. Step 2: Convert to fraction form
    12,642.96/18,968.16 = 3,758.36/x
  3. Step 3: Cross multiply
    12,642.96x = 18,968.16 × 3,758.36
  4. Step 4: Simplify right side
    12,642.96x = 71,289,078.98
  5. Step 5: Solve for x
    x = 71,289,078.98/12,642.96
  6. Step 6: Final answer
    x = 5,638.64

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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.