Home / 13,912.36-20,866.32-5,145.28

Finding the Fourth Proportional to 13,912.36, 20,866.32 and 5,145.28

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Solution

The fourth proportional to 13,912.36, 20,866.32 and 5,145.28 is: 7,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.36 : 20,866.32 = 5,145.28 : x
  2. Step 2: Convert to fraction form
    13,912.36/20,866.32 = 5,145.28/x
  3. Step 3: Cross multiply
    13,912.36x = 20,866.32 × 5,145.28
  4. Step 4: Simplify right side
    13,912.36x = 107,363,058.97
  5. Step 5: Solve for x
    x = 107,363,058.97/13,912.36
  6. Step 6: Final answer
    x = 7,717.10

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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.