Home / 7,987.60-11,979.24-3,055.78

Finding the Fourth Proportional to 7,987.60, 11,979.24 and 3,055.78

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Solution

The fourth proportional to 7,987.60, 11,979.24 and 3,055.78 is: 4,582.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.60 : 11,979.24 = 3,055.78 : x
  2. Step 2: Convert to fraction form
    7,987.60/11,979.24 = 3,055.78/x
  3. Step 3: Cross multiply
    7,987.60x = 11,979.24 × 3,055.78
  4. Step 4: Simplify right side
    7,987.60x = 36,605,922.01
  5. Step 5: Solve for x
    x = 36,605,922.01/7,987.60
  6. Step 6: Final answer
    x = 4,582.84

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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.