Home / 21,680.67-29,919.91-12,249.03

Finding the Fourth Proportional to 21,680.67, 29,919.91 and 12,249.03

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Solution

The fourth proportional to 21,680.67, 29,919.91 and 12,249.03 is: 16,903.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.67 : 29,919.91 = 12,249.03 : x
  2. Step 2: Convert to fraction form
    21,680.67/29,919.91 = 12,249.03/x
  3. Step 3: Cross multiply
    21,680.67x = 29,919.91 × 12,249.03
  4. Step 4: Simplify right side
    21,680.67x = 366,489,965.30
  5. Step 5: Solve for x
    x = 366,489,965.30/21,680.67
  6. Step 6: Final answer
    x = 16,903.99

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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.