Home / 12,642.72-18,964.08-3,408.48

Finding the Fourth Proportional to 12,642.72, 18,964.08 and 3,408.48

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Solution

The fourth proportional to 12,642.72, 18,964.08 and 3,408.48 is: 5,112.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.72 : 18,964.08 = 3,408.48 : x
  2. Step 2: Convert to fraction form
    12,642.72/18,964.08 = 3,408.48/x
  3. Step 3: Cross multiply
    12,642.72x = 18,964.08 × 3,408.48
  4. Step 4: Simplify right side
    12,642.72x = 64,638,687.40
  5. Step 5: Solve for x
    x = 64,638,687.40/12,642.72
  6. Step 6: Final answer
    x = 5,112.72

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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.