Home / 13,914.36-20,869.32-5,147.28

Finding the Fourth Proportional to 13,914.36, 20,869.32 and 5,147.28

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Solution

The fourth proportional to 13,914.36, 20,869.32 and 5,147.28 is: 7,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,914.36 : 20,869.32 = 5,147.28 : x
  2. Step 2: Convert to fraction form
    13,914.36/20,869.32 = 5,147.28/x
  3. Step 3: Cross multiply
    13,914.36x = 20,869.32 × 5,147.28
  4. Step 4: Simplify right side
    13,914.36x = 107,420,233.45
  5. Step 5: Solve for x
    x = 107,420,233.45/13,914.36
  6. Step 6: Final answer
    x = 7,720.10

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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.