Home / 5,138.91-7,698.41-3,378.61

Finding the Fourth Proportional to 5,138.91, 7,698.41 and 3,378.61

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Solution

The fourth proportional to 5,138.91, 7,698.41 and 3,378.61 is: 5,061.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.91 : 7,698.41 = 3,378.61 : x
  2. Step 2: Convert to fraction form
    5,138.91/7,698.41 = 3,378.61/x
  3. Step 3: Cross multiply
    5,138.91x = 7,698.41 × 3,378.61
  4. Step 4: Simplify right side
    5,138.91x = 26,009,869.63
  5. Step 5: Solve for x
    x = 26,009,869.63/5,138.91
  6. Step 6: Final answer
    x = 5,061.36

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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.