Home / 21,736.71-29,999.19-13,243.80

Finding the Fourth Proportional to 21,736.71, 29,999.19 and 13,243.80

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Solution

The fourth proportional to 21,736.71, 29,999.19 and 13,243.80 is: 18,277.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,736.71 : 29,999.19 = 13,243.80 : x
  2. Step 2: Convert to fraction form
    21,736.71/29,999.19 = 13,243.80/x
  3. Step 3: Cross multiply
    21,736.71x = 29,999.19 × 13,243.80
  4. Step 4: Simplify right side
    21,736.71x = 397,303,272.52
  5. Step 5: Solve for x
    x = 397,303,272.52/21,736.71
  6. Step 6: Final answer
    x = 18,277.99

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1.5x scale

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.