Home / 21,476.36-29,631.30-13,923

Finding the Fourth Proportional to 21,476.36, 29,631.30 and 13,923

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Solution

The fourth proportional to 21,476.36, 29,631.30 and 13,923 is: 19,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,476.36 : 29,631.30 = 13,923 : x
  2. Step 2: Convert to fraction form
    21,476.36/29,631.30 = 13,923/x
  3. Step 3: Cross multiply
    21,476.36x = 29,631.30 × 13,923
  4. Step 4: Simplify right side
    21,476.36x = 412,556,589.90
  5. Step 5: Solve for x
    x = 412,556,589.90/21,476.36
  6. Step 6: Final answer
    x = 19,209.80

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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.