Home / 21,092.88-29,107.76-13,131.12

Finding the Fourth Proportional to 21,092.88, 29,107.76 and 13,131.12

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Solution

The fourth proportional to 21,092.88, 29,107.76 and 13,131.12 is: 18,120.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,092.88 : 29,107.76 = 13,131.12 : x
  2. Step 2: Convert to fraction form
    21,092.88/29,107.76 = 13,131.12/x
  3. Step 3: Cross multiply
    21,092.88x = 29,107.76 × 13,131.12
  4. Step 4: Simplify right side
    21,092.88x = 382,217,489.49
  5. Step 5: Solve for x
    x = 382,217,489.49/21,092.88
  6. Step 6: Final answer
    x = 18,120.69

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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.