Home / 21,080.88-29,091.39-11,520.66

Finding the Fourth Proportional to 21,080.88, 29,091.39 and 11,520.66

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Solution

The fourth proportional to 21,080.88, 29,091.39 and 11,520.66 is: 15,898.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.88 : 29,091.39 = 11,520.66 : x
  2. Step 2: Convert to fraction form
    21,080.88/29,091.39 = 11,520.66/x
  3. Step 3: Cross multiply
    21,080.88x = 29,091.39 × 11,520.66
  4. Step 4: Simplify right side
    21,080.88x = 335,152,013.12
  5. Step 5: Solve for x
    x = 335,152,013.12/21,080.88
  6. Step 6: Final answer
    x = 15,898.39

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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.