Home / 5,150-7,724.64-2,686.20

Finding the Fourth Proportional to 5,150, 7,724.64 and 2,686.20

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Solution

The fourth proportional to 5,150, 7,724.64 and 2,686.20 is: 4,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,150 : 7,724.64 = 2,686.20 : x
  2. Step 2: Convert to fraction form
    5,150/7,724.64 = 2,686.20/x
  3. Step 3: Cross multiply
    5,150x = 7,724.64 × 2,686.20
  4. Step 4: Simplify right side
    5,150x = 20,749,927.97
  5. Step 5: Solve for x
    x = 20,749,927.97/5,150
  6. Step 6: Final answer
    x = 4,029.11

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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.