Home / 21,161.64-29,201.10-11,729.40

Finding the Fourth Proportional to 21,161.64, 29,201.10 and 11,729.40

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Solution

The fourth proportional to 21,161.64, 29,201.10 and 11,729.40 is: 16,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.64 : 29,201.10 = 11,729.40 : x
  2. Step 2: Convert to fraction form
    21,161.64/29,201.10 = 11,729.40/x
  3. Step 3: Cross multiply
    21,161.64x = 29,201.10 × 11,729.40
  4. Step 4: Simplify right side
    21,161.64x = 342,511,382.34
  5. Step 5: Solve for x
    x = 342,511,382.34/21,161.64
  6. Step 6: Final answer
    x = 16,185.48

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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.