Home / 12,403.22-17,121.35-8,628.57

Finding the Fourth Proportional to 12,403.22, 17,121.35 and 8,628.57

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Solution

The fourth proportional to 12,403.22, 17,121.35 and 8,628.57 is: 11,910.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.22 : 17,121.35 = 8,628.57 : x
  2. Step 2: Convert to fraction form
    12,403.22/17,121.35 = 8,628.57/x
  3. Step 3: Cross multiply
    12,403.22x = 17,121.35 × 8,628.57
  4. Step 4: Simplify right side
    12,403.22x = 147,732,788.54
  5. Step 5: Solve for x
    x = 147,732,788.54/12,403.22
  6. Step 6: Final answer
    x = 11,910.85

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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.