Home / 8,129.97-11,221.47-4,988.79

Finding the Fourth Proportional to 8,129.97, 11,221.47 and 4,988.79

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Solution

The fourth proportional to 8,129.97, 11,221.47 and 4,988.79 is: 6,885.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.97 : 11,221.47 = 4,988.79 : x
  2. Step 2: Convert to fraction form
    8,129.97/11,221.47 = 4,988.79/x
  3. Step 3: Cross multiply
    8,129.97x = 11,221.47 × 4,988.79
  4. Step 4: Simplify right side
    8,129.97x = 55,981,557.32
  5. Step 5: Solve for x
    x = 55,981,557.32/8,129.97
  6. Step 6: Final answer
    x = 6,885.83

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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.