Home / 20,218.57-27,901.91-11,721.31

Finding the Fourth Proportional to 20,218.57, 27,901.91 and 11,721.31

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Solution

The fourth proportional to 20,218.57, 27,901.91 and 11,721.31 is: 16,175.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.57 : 27,901.91 = 11,721.31 : x
  2. Step 2: Convert to fraction form
    20,218.57/27,901.91 = 11,721.31/x
  3. Step 3: Cross multiply
    20,218.57x = 27,901.91 × 11,721.31
  4. Step 4: Simplify right side
    20,218.57x = 327,046,878.10
  5. Step 5: Solve for x
    x = 327,046,878.10/20,218.57
  6. Step 6: Final answer
    x = 16,175.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.