Home / 7,986.86-11,981.73-2,721.58

Finding the Fourth Proportional to 7,986.86, 11,981.73 and 2,721.58

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Solution

The fourth proportional to 7,986.86, 11,981.73 and 2,721.58 is: 4,082.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.86 : 11,981.73 = 2,721.58 : x
  2. Step 2: Convert to fraction form
    7,986.86/11,981.73 = 2,721.58/x
  3. Step 3: Cross multiply
    7,986.86x = 11,981.73 × 2,721.58
  4. Step 4: Simplify right side
    7,986.86x = 32,609,261.92
  5. Step 5: Solve for x
    x = 32,609,261.92/7,986.86
  6. Step 6: Final answer
    x = 4,082.86

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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.