Home / 21,661.29-29,883.74-13,163.58

Finding the Fourth Proportional to 21,661.29, 29,883.74 and 13,163.58

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Solution

The fourth proportional to 21,661.29, 29,883.74 and 13,163.58 is: 18,160.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.29 : 29,883.74 = 13,163.58 : x
  2. Step 2: Convert to fraction form
    21,661.29/29,883.74 = 13,163.58/x
  3. Step 3: Cross multiply
    21,661.29x = 29,883.74 × 13,163.58
  4. Step 4: Simplify right side
    21,661.29x = 393,376,936.37
  5. Step 5: Solve for x
    x = 393,376,936.37/21,661.29
  6. Step 6: Final answer
    x = 18,160.37

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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.