Home / 21,882.14-32,820.13-12,491.70

Finding the Fourth Proportional to 21,882.14, 32,820.13 and 12,491.70

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Solution

The fourth proportional to 21,882.14, 32,820.13 and 12,491.70 is: 18,735.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,882.14 : 32,820.13 = 12,491.70 : x
  2. Step 2: Convert to fraction form
    21,882.14/32,820.13 = 12,491.70/x
  3. Step 3: Cross multiply
    21,882.14x = 32,820.13 × 12,491.70
  4. Step 4: Simplify right side
    21,882.14x = 409,979,217.92
  5. Step 5: Solve for x
    x = 409,979,217.92/21,882.14
  6. Step 6: Final answer
    x = 18,735.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.