Home / 19,990.72-27,589-11,040.16

Finding the Fourth Proportional to 19,990.72, 27,589 and 11,040.16

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Solution

The fourth proportional to 19,990.72, 27,589 and 11,040.16 is: 15,236.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.72 : 27,589 = 11,040.16 : x
  2. Step 2: Convert to fraction form
    19,990.72/27,589 = 11,040.16/x
  3. Step 3: Cross multiply
    19,990.72x = 27,589 × 11,040.16
  4. Step 4: Simplify right side
    19,990.72x = 304,586,974.24
  5. Step 5: Solve for x
    x = 304,586,974.24/19,990.72
  6. Step 6: Final answer
    x = 15,236.42

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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.