Home / 11,920.73-16,451.38-6,615.56

Finding the Fourth Proportional to 11,920.73, 16,451.38 and 6,615.56

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Solution

The fourth proportional to 11,920.73, 16,451.38 and 6,615.56 is: 9,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.73 : 16,451.38 = 6,615.56 : x
  2. Step 2: Convert to fraction form
    11,920.73/16,451.38 = 6,615.56/x
  3. Step 3: Cross multiply
    11,920.73x = 16,451.38 × 6,615.56
  4. Step 4: Simplify right side
    11,920.73x = 108,835,091.47
  5. Step 5: Solve for x
    x = 108,835,091.47/11,920.73
  6. Step 6: Final answer
    x = 9,129.90

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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.