Home / 21,633.20-29,860.20-12,682.64

Finding the Fourth Proportional to 21,633.20, 29,860.20 and 12,682.64

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Solution

The fourth proportional to 21,633.20, 29,860.20 and 12,682.64 is: 17,505.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,633.20 : 29,860.20 = 12,682.64 : x
  2. Step 2: Convert to fraction form
    21,633.20/29,860.20 = 12,682.64/x
  3. Step 3: Cross multiply
    21,633.20x = 29,860.20 × 12,682.64
  4. Step 4: Simplify right side
    21,633.20x = 378,706,166.93
  5. Step 5: Solve for x
    x = 378,706,166.93/21,633.20
  6. Step 6: Final answer
    x = 17,505.79

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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.