Home / 20,092.31-27,728.07-11,139.28

Finding the Fourth Proportional to 20,092.31, 27,728.07 and 11,139.28

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Solution

The fourth proportional to 20,092.31, 27,728.07 and 11,139.28 is: 15,372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,092.31 : 27,728.07 = 11,139.28 : x
  2. Step 2: Convert to fraction form
    20,092.31/27,728.07 = 11,139.28/x
  3. Step 3: Cross multiply
    20,092.31x = 27,728.07 × 11,139.28
  4. Step 4: Simplify right side
    20,092.31x = 308,870,679.89
  5. Step 5: Solve for x
    x = 308,870,679.89/20,092.31
  6. Step 6: Final answer
    x = 15,372.58

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1.5x scale

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.