Home / 13,708.72-20,511.24-12,879.28

Finding the Fourth Proportional to 13,708.72, 20,511.24 and 12,879.28

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Solution

The fourth proportional to 13,708.72, 20,511.24 and 12,879.28 is: 19,270.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.72 : 20,511.24 = 12,879.28 : x
  2. Step 2: Convert to fraction form
    13,708.72/20,511.24 = 12,879.28/x
  3. Step 3: Cross multiply
    13,708.72x = 20,511.24 × 12,879.28
  4. Step 4: Simplify right side
    13,708.72x = 264,170,003.11
  5. Step 5: Solve for x
    x = 264,170,003.11/13,708.72
  6. Step 6: Final answer
    x = 19,270.22

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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.