Home / 8,145.15-11,238.91-5,311.77

Finding the Fourth Proportional to 8,145.15, 11,238.91 and 5,311.77

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Solution

The fourth proportional to 8,145.15, 11,238.91 and 5,311.77 is: 7,329.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.15 : 11,238.91 = 5,311.77 : x
  2. Step 2: Convert to fraction form
    8,145.15/11,238.91 = 5,311.77/x
  3. Step 3: Cross multiply
    8,145.15x = 11,238.91 × 5,311.77
  4. Step 4: Simplify right side
    8,145.15x = 59,698,504.97
  5. Step 5: Solve for x
    x = 59,698,504.97/8,145.15
  6. Step 6: Final answer
    x = 7,329.33

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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.