Home / 13,879.20-19,108.80-11,235.36

Finding the Fourth Proportional to 13,879.20, 19,108.80 and 11,235.36

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Solution

The fourth proportional to 13,879.20, 19,108.80 and 11,235.36 is: 15,468.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.20 : 19,108.80 = 11,235.36 : x
  2. Step 2: Convert to fraction form
    13,879.20/19,108.80 = 11,235.36/x
  3. Step 3: Cross multiply
    13,879.20x = 19,108.80 × 11,235.36
  4. Step 4: Simplify right side
    13,879.20x = 214,694,247.17
  5. Step 5: Solve for x
    x = 214,694,247.17/13,879.20
  6. Step 6: Final answer
    x = 15,468.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.