Home / 11,385.38-17,078.07-3,988.16

Finding the Fourth Proportional to 11,385.38, 17,078.07 and 3,988.16

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Solution

The fourth proportional to 11,385.38, 17,078.07 and 3,988.16 is: 5,982.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.38 : 17,078.07 = 3,988.16 : x
  2. Step 2: Convert to fraction form
    11,385.38/17,078.07 = 3,988.16/x
  3. Step 3: Cross multiply
    11,385.38x = 17,078.07 × 3,988.16
  4. Step 4: Simplify right side
    11,385.38x = 68,109,990.26
  5. Step 5: Solve for x
    x = 68,109,990.26/11,385.38
  6. Step 6: Final answer
    x = 5,982.24

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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.