Home / 21,718.82-29,975.20-13,761.79

Finding the Fourth Proportional to 21,718.82, 29,975.20 and 13,761.79

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Solution

The fourth proportional to 21,718.82, 29,975.20 and 13,761.79 is: 18,993.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.82 : 29,975.20 = 13,761.79 : x
  2. Step 2: Convert to fraction form
    21,718.82/29,975.20 = 13,761.79/x
  3. Step 3: Cross multiply
    21,718.82x = 29,975.20 × 13,761.79
  4. Step 4: Simplify right side
    21,718.82x = 412,512,298.27
  5. Step 5: Solve for x
    x = 412,512,298.27/21,718.82
  6. Step 6: Final answer
    x = 18,993.31

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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.