Home / 7,721.38-11,581.62-2,789.74

Finding the Fourth Proportional to 7,721.38, 11,581.62 and 2,789.74

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Solution

The fourth proportional to 7,721.38, 11,581.62 and 2,789.74 is: 4,184.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.38 : 11,581.62 = 2,789.74 : x
  2. Step 2: Convert to fraction form
    7,721.38/11,581.62 = 2,789.74/x
  3. Step 3: Cross multiply
    7,721.38x = 11,581.62 × 2,789.74
  4. Step 4: Simplify right side
    7,721.38x = 32,309,708.58
  5. Step 5: Solve for x
    x = 32,309,708.58/7,721.38
  6. Step 6: Final answer
    x = 4,184.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.