Home / 21,682.12-29,942.58-18,519.88

Finding the Fourth Proportional to 21,682.12, 29,942.58 and 18,519.88

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Solution

The fourth proportional to 21,682.12, 29,942.58 and 18,519.88 is: 25,575.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.12 : 29,942.58 = 18,519.88 : x
  2. Step 2: Convert to fraction form
    21,682.12/29,942.58 = 18,519.88/x
  3. Step 3: Cross multiply
    21,682.12x = 29,942.58 × 18,519.88
  4. Step 4: Simplify right side
    21,682.12x = 554,532,988.49
  5. Step 5: Solve for x
    x = 554,532,988.49/21,682.12
  6. Step 6: Final answer
    x = 25,575.59

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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.