Home / 10,910.36-16,360.68-3,980

Finding the Fourth Proportional to 10,910.36, 16,360.68 and 3,980

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Solution

The fourth proportional to 10,910.36, 16,360.68 and 3,980 is: 5,968.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,910.36 : 16,360.68 = 3,980 : x
  2. Step 2: Convert to fraction form
    10,910.36/16,360.68 = 3,980/x
  3. Step 3: Cross multiply
    10,910.36x = 16,360.68 × 3,980
  4. Step 4: Simplify right side
    10,910.36x = 65,115,506.40
  5. Step 5: Solve for x
    x = 65,115,506.40/10,910.36
  6. Step 6: Final answer
    x = 5,968.23

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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.