Home / 13,921.14-20,881.70-3,391.16

Finding the Fourth Proportional to 13,921.14, 20,881.70 and 3,391.16

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Solution

The fourth proportional to 13,921.14, 20,881.70 and 3,391.16 is: 5,086.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.14 : 20,881.70 = 3,391.16 : x
  2. Step 2: Convert to fraction form
    13,921.14/20,881.70 = 3,391.16/x
  3. Step 3: Cross multiply
    13,921.14x = 20,881.70 × 3,391.16
  4. Step 4: Simplify right side
    13,921.14x = 70,813,077.12
  5. Step 5: Solve for x
    x = 70,813,077.12/13,921.14
  6. Step 6: Final answer
    x = 5,086.73

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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.