Home / 7,921.68-11,873.61-2,987.97

Finding the Fourth Proportional to 7,921.68, 11,873.61 and 2,987.97

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Solution

The fourth proportional to 7,921.68, 11,873.61 and 2,987.97 is: 4,478.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.68 : 11,873.61 = 2,987.97 : x
  2. Step 2: Convert to fraction form
    7,921.68/11,873.61 = 2,987.97/x
  3. Step 3: Cross multiply
    7,921.68x = 11,873.61 × 2,987.97
  4. Step 4: Simplify right side
    7,921.68x = 35,477,990.47
  5. Step 5: Solve for x
    x = 35,477,990.47/7,921.68
  6. Step 6: Final answer
    x = 4,478.59

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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.