Home / 21,718.80-29,975.16-13,761.77

Finding the Fourth Proportional to 21,718.80, 29,975.16 and 13,761.77

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Solution

The fourth proportional to 21,718.80, 29,975.16 and 13,761.77 is: 18,993.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.80 : 29,975.16 = 13,761.77 : x
  2. Step 2: Convert to fraction form
    21,718.80/29,975.16 = 13,761.77/x
  3. Step 3: Cross multiply
    21,718.80x = 29,975.16 × 13,761.77
  4. Step 4: Simplify right side
    21,718.80x = 412,511,257.63
  5. Step 5: Solve for x
    x = 412,511,257.63/21,718.80
  6. Step 6: Final answer
    x = 18,993.28

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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.