Home / 21,729.96-29,989.26-12,301.56

Finding the Fourth Proportional to 21,729.96, 29,989.26 and 12,301.56

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Solution

The fourth proportional to 21,729.96, 29,989.26 and 12,301.56 is: 16,977.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.96 : 29,989.26 = 12,301.56 : x
  2. Step 2: Convert to fraction form
    21,729.96/29,989.26 = 12,301.56/x
  3. Step 3: Cross multiply
    21,729.96x = 29,989.26 × 12,301.56
  4. Step 4: Simplify right side
    21,729.96x = 368,914,681.25
  5. Step 5: Solve for x
    x = 368,914,681.25/21,729.96
  6. Step 6: Final answer
    x = 16,977.24

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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.