Home / 21,515.49-29,691.77-11,956.26

Finding the Fourth Proportional to 21,515.49, 29,691.77 and 11,956.26

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Solution

The fourth proportional to 21,515.49, 29,691.77 and 11,956.26 is: 16,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.49 : 29,691.77 = 11,956.26 : x
  2. Step 2: Convert to fraction form
    21,515.49/29,691.77 = 11,956.26/x
  3. Step 3: Cross multiply
    21,515.49x = 29,691.77 × 11,956.26
  4. Step 4: Simplify right side
    21,515.49x = 355,002,462.20
  5. Step 5: Solve for x
    x = 355,002,462.20/21,515.49
  6. Step 6: Final answer
    x = 16,499.85

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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.