Home / 21,406.26-29,540.85-12,908.82

Finding the Fourth Proportional to 21,406.26, 29,540.85 and 12,908.82

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Solution

The fourth proportional to 21,406.26, 29,540.85 and 12,908.82 is: 17,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.26 : 29,540.85 = 12,908.82 : x
  2. Step 2: Convert to fraction form
    21,406.26/29,540.85 = 12,908.82/x
  3. Step 3: Cross multiply
    21,406.26x = 29,540.85 × 12,908.82
  4. Step 4: Simplify right side
    21,406.26x = 381,337,515.30
  5. Step 5: Solve for x
    x = 381,337,515.30/21,406.26
  6. Step 6: Final answer
    x = 17,814.30

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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.