Home / 21,584.76-29,791.40-13,621.64

Finding the Fourth Proportional to 21,584.76, 29,791.40 and 13,621.64

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Solution

The fourth proportional to 21,584.76, 29,791.40 and 13,621.64 is: 18,800.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,584.76 : 29,791.40 = 13,621.64 : x
  2. Step 2: Convert to fraction form
    21,584.76/29,791.40 = 13,621.64/x
  3. Step 3: Cross multiply
    21,584.76x = 29,791.40 × 13,621.64
  4. Step 4: Simplify right side
    21,584.76x = 405,807,725.90
  5. Step 5: Solve for x
    x = 405,807,725.90/21,584.76
  6. Step 6: Final answer
    x = 18,800.66

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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.