Home / 7,985.36-11,979.48-2,720.08

Finding the Fourth Proportional to 7,985.36, 11,979.48 and 2,720.08

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Solution

The fourth proportional to 7,985.36, 11,979.48 and 2,720.08 is: 4,080.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.36 : 11,979.48 = 2,720.08 : x
  2. Step 2: Convert to fraction form
    7,985.36/11,979.48 = 2,720.08/x
  3. Step 3: Cross multiply
    7,985.36x = 11,979.48 × 2,720.08
  4. Step 4: Simplify right side
    7,985.36x = 32,585,165.31
  5. Step 5: Solve for x
    x = 32,585,165.31/7,985.36
  6. Step 6: Final answer
    x = 4,080.61

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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.