Home / 13,415.36-20,120.10-5,515.93

Finding the Fourth Proportional to 13,415.36, 20,120.10 and 5,515.93

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Solution

The fourth proportional to 13,415.36, 20,120.10 and 5,515.93 is: 8,272.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.36 : 20,120.10 = 5,515.93 : x
  2. Step 2: Convert to fraction form
    13,415.36/20,120.10 = 5,515.93/x
  3. Step 3: Cross multiply
    13,415.36x = 20,120.10 × 5,515.93
  4. Step 4: Simplify right side
    13,415.36x = 110,981,067.66
  5. Step 5: Solve for x
    x = 110,981,067.66/13,415.36
  6. Step 6: Final answer
    x = 8,272.69

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1.5x scale

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.