Home / 7,987.26-11,980.88-2,143.41

Finding the Fourth Proportional to 7,987.26, 11,980.88 and 2,143.41

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Solution

The fourth proportional to 7,987.26, 11,980.88 and 2,143.41 is: 3,215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.26 : 11,980.88 = 2,143.41 : x
  2. Step 2: Convert to fraction form
    7,987.26/11,980.88 = 2,143.41/x
  3. Step 3: Cross multiply
    7,987.26x = 11,980.88 × 2,143.41
  4. Step 4: Simplify right side
    7,987.26x = 25,679,927.28
  5. Step 5: Solve for x
    x = 25,679,927.28/7,987.26
  6. Step 6: Final answer
    x = 3,215.11

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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.