Home / 7,986.13-11,980.65-2,720.87

Finding the Fourth Proportional to 7,986.13, 11,980.65 and 2,720.87

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Solution

The fourth proportional to 7,986.13, 11,980.65 and 2,720.87 is: 4,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.13 : 11,980.65 = 2,720.87 : x
  2. Step 2: Convert to fraction form
    7,986.13/11,980.65 = 2,720.87/x
  3. Step 3: Cross multiply
    7,986.13x = 11,980.65 × 2,720.87
  4. Step 4: Simplify right side
    7,986.13x = 32,597,791.17
  5. Step 5: Solve for x
    x = 32,597,791.17/7,986.13
  6. Step 6: Final answer
    x = 4,081.80

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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.