Home / 5,119.82-7,679.91-1,422.02

Finding the Fourth Proportional to 5,119.82, 7,679.91 and 1,422.02

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Solution

The fourth proportional to 5,119.82, 7,679.91 and 1,422.02 is: 2,133.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.82 : 7,679.91 = 1,422.02 : x
  2. Step 2: Convert to fraction form
    5,119.82/7,679.91 = 1,422.02/x
  3. Step 3: Cross multiply
    5,119.82x = 7,679.91 × 1,422.02
  4. Step 4: Simplify right side
    5,119.82x = 10,920,985.62
  5. Step 5: Solve for x
    x = 10,920,985.62/5,119.82
  6. Step 6: Final answer
    x = 2,133.08

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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.