Home / 13,979.10-20,982.51-12,408.06

Finding the Fourth Proportional to 13,979.10, 20,982.51 and 12,408.06

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Solution

The fourth proportional to 13,979.10, 20,982.51 and 12,408.06 is: 18,624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.10 : 20,982.51 = 12,408.06 : x
  2. Step 2: Convert to fraction form
    13,979.10/20,982.51 = 12,408.06/x
  3. Step 3: Cross multiply
    13,979.10x = 20,982.51 × 12,408.06
  4. Step 4: Simplify right side
    13,979.10x = 260,352,243.03
  5. Step 5: Solve for x
    x = 260,352,243.03/13,979.10
  6. Step 6: Final answer
    x = 18,624.39

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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.