Home / 21,389.25-29,517.81-11,957.85

Finding the Fourth Proportional to 21,389.25, 29,517.81 and 11,957.85

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Solution

The fourth proportional to 21,389.25, 29,517.81 and 11,957.85 is: 16,502.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.25 : 29,517.81 = 11,957.85 : x
  2. Step 2: Convert to fraction form
    21,389.25/29,517.81 = 11,957.85/x
  3. Step 3: Cross multiply
    21,389.25x = 29,517.81 × 11,957.85
  4. Step 4: Simplify right side
    21,389.25x = 352,969,544.31
  5. Step 5: Solve for x
    x = 352,969,544.31/21,389.25
  6. Step 6: Final answer
    x = 16,502.19

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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.