Home / 7,721.81-11,581.63-2,456.81

Finding the Fourth Proportional to 7,721.81, 11,581.63 and 2,456.81

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Solution

The fourth proportional to 7,721.81, 11,581.63 and 2,456.81 is: 3,684.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.81 : 11,581.63 = 2,456.81 : x
  2. Step 2: Convert to fraction form
    7,721.81/11,581.63 = 2,456.81/x
  3. Step 3: Cross multiply
    7,721.81x = 11,581.63 × 2,456.81
  4. Step 4: Simplify right side
    7,721.81x = 28,453,800.35
  5. Step 5: Solve for x
    x = 28,453,800.35/7,721.81
  6. Step 6: Final answer
    x = 3,684.86

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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.