Home / 7,987.68-11,979.44-3,309

Finding the Fourth Proportional to 7,987.68, 11,979.44 and 3,309

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Solution

The fourth proportional to 7,987.68, 11,979.44 and 3,309 is: 4,962.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.68 : 11,979.44 = 3,309 : x
  2. Step 2: Convert to fraction form
    7,987.68/11,979.44 = 3,309/x
  3. Step 3: Cross multiply
    7,987.68x = 11,979.44 × 3,309
  4. Step 4: Simplify right side
    7,987.68x = 39,639,966.96
  5. Step 5: Solve for x
    x = 39,639,966.96/7,987.68
  6. Step 6: Final answer
    x = 4,962.64

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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.