Home / 21,539.09-29,724.63-13,042.79

Finding the Fourth Proportional to 21,539.09, 29,724.63 and 13,042.79

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Solution

The fourth proportional to 21,539.09, 29,724.63 and 13,042.79 is: 17,999.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.09 : 29,724.63 = 13,042.79 : x
  2. Step 2: Convert to fraction form
    21,539.09/29,724.63 = 13,042.79/x
  3. Step 3: Cross multiply
    21,539.09x = 29,724.63 × 13,042.79
  4. Step 4: Simplify right side
    21,539.09x = 387,692,230.14
  5. Step 5: Solve for x
    x = 387,692,230.14/21,539.09
  6. Step 6: Final answer
    x = 17,999.48

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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.