Home / 21,091.80-29,105.53-11,659.75

Finding the Fourth Proportional to 21,091.80, 29,105.53 and 11,659.75

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Solution

The fourth proportional to 21,091.80, 29,105.53 and 11,659.75 is: 16,089.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.80 : 29,105.53 = 11,659.75 : x
  2. Step 2: Convert to fraction form
    21,091.80/29,105.53 = 11,659.75/x
  3. Step 3: Cross multiply
    21,091.80x = 29,105.53 × 11,659.75
  4. Step 4: Simplify right side
    21,091.80x = 339,363,203.42
  5. Step 5: Solve for x
    x = 339,363,203.42/21,091.80
  6. Step 6: Final answer
    x = 16,089.82

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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.