Home / 7,987.25-11,980.89-2,143.42

Finding the Fourth Proportional to 7,987.25, 11,980.89 and 2,143.42

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Solution

The fourth proportional to 7,987.25, 11,980.89 and 2,143.42 is: 3,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.25 : 11,980.89 = 2,143.42 : x
  2. Step 2: Convert to fraction form
    7,987.25/11,980.89 = 2,143.42/x
  3. Step 3: Cross multiply
    7,987.25x = 11,980.89 × 2,143.42
  4. Step 4: Simplify right side
    7,987.25x = 25,680,049.29
  5. Step 5: Solve for x
    x = 25,680,049.29/7,987.25
  6. Step 6: Final answer
    x = 3,215.13

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1.5x scale

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.