Home / 21,331.22-29,446.52-13,781.24

Finding the Fourth Proportional to 21,331.22, 29,446.52 and 13,781.24

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Solution

The fourth proportional to 21,331.22, 29,446.52 and 13,781.24 is: 19,024.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.22 : 29,446.52 = 13,781.24 : x
  2. Step 2: Convert to fraction form
    21,331.22/29,446.52 = 13,781.24/x
  3. Step 3: Cross multiply
    21,331.22x = 29,446.52 × 13,781.24
  4. Step 4: Simplify right side
    21,331.22x = 405,809,559.28
  5. Step 5: Solve for x
    x = 405,809,559.28/21,331.22
  6. Step 6: Final answer
    x = 19,024.21

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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.