Home / 13,918.89-20,878.32-3,388.91

Finding the Fourth Proportional to 13,918.89, 20,878.32 and 3,388.91

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Solution

The fourth proportional to 13,918.89, 20,878.32 and 3,388.91 is: 5,083.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.89 : 20,878.32 = 3,388.91 : x
  2. Step 2: Convert to fraction form
    13,918.89/20,878.32 = 3,388.91/x
  3. Step 3: Cross multiply
    13,918.89x = 20,878.32 × 3,388.91
  4. Step 4: Simplify right side
    13,918.89x = 70,754,655.75
  5. Step 5: Solve for x
    x = 70,754,655.75/13,918.89
  6. Step 6: Final answer
    x = 5,083.36

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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.