Home / 11,781.16-17,671.28-3,989.97

Finding the Fourth Proportional to 11,781.16, 17,671.28 and 3,989.97

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Solution

The fourth proportional to 11,781.16, 17,671.28 and 3,989.97 is: 5,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.16 : 17,671.28 = 3,989.97 : x
  2. Step 2: Convert to fraction form
    11,781.16/17,671.28 = 3,989.97/x
  3. Step 3: Cross multiply
    11,781.16x = 17,671.28 × 3,989.97
  4. Step 4: Simplify right side
    11,781.16x = 70,507,857.11
  5. Step 5: Solve for x
    x = 70,507,857.11/11,781.16
  6. Step 6: Final answer
    x = 5,984.80

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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.