Home / 13,138.84-19,707.78-3,904.60

Finding the Fourth Proportional to 13,138.84, 19,707.78 and 3,904.60

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Solution

The fourth proportional to 13,138.84, 19,707.78 and 3,904.60 is: 5,856.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.84 : 19,707.78 = 3,904.60 : x
  2. Step 2: Convert to fraction form
    13,138.84/19,707.78 = 3,904.60/x
  3. Step 3: Cross multiply
    13,138.84x = 19,707.78 × 3,904.60
  4. Step 4: Simplify right side
    13,138.84x = 76,950,997.79
  5. Step 5: Solve for x
    x = 76,950,997.79/13,138.84
  6. Step 6: Final answer
    x = 5,856.76

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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.