Home / 12,406.75-17,129.24-8,628.55

Finding the Fourth Proportional to 12,406.75, 17,129.24 and 8,628.55

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Solution

The fourth proportional to 12,406.75, 17,129.24 and 8,628.55 is: 11,912.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,406.75 : 17,129.24 = 8,628.55 : x
  2. Step 2: Convert to fraction form
    12,406.75/17,129.24 = 8,628.55/x
  3. Step 3: Cross multiply
    12,406.75x = 17,129.24 × 8,628.55
  4. Step 4: Simplify right side
    12,406.75x = 147,800,460.66
  5. Step 5: Solve for x
    x = 147,800,460.66/12,406.75
  6. Step 6: Final answer
    x = 11,912.91

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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.