Home / 21,287.26-29,372.79-11,854

Finding the Fourth Proportional to 21,287.26, 29,372.79 and 11,854

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Solution

The fourth proportional to 21,287.26, 29,372.79 and 11,854 is: 16,356.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.26 : 29,372.79 = 11,854 : x
  2. Step 2: Convert to fraction form
    21,287.26/29,372.79 = 11,854/x
  3. Step 3: Cross multiply
    21,287.26x = 29,372.79 × 11,854
  4. Step 4: Simplify right side
    21,287.26x = 348,185,052.66
  5. Step 5: Solve for x
    x = 348,185,052.66/21,287.26
  6. Step 6: Final answer
    x = 16,356.50

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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.