Home / 5,119-7,678.44-3,387.20

Finding the Fourth Proportional to 5,119, 7,678.44 and 3,387.20

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Solution

The fourth proportional to 5,119, 7,678.44 and 3,387.20 is: 5,080.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119 : 7,678.44 = 3,387.20 : x
  2. Step 2: Convert to fraction form
    5,119/7,678.44 = 3,387.20/x
  3. Step 3: Cross multiply
    5,119x = 7,678.44 × 3,387.20
  4. Step 4: Simplify right side
    5,119x = 26,008,411.97
  5. Step 5: Solve for x
    x = 26,008,411.97/5,119
  6. Step 6: Final answer
    x = 5,080.76

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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.