Home / 13,814.12-20,721.16-3,425.87

Finding the Fourth Proportional to 13,814.12, 20,721.16 and 3,425.87

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Solution

The fourth proportional to 13,814.12, 20,721.16 and 3,425.87 is: 5,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,814.12 : 20,721.16 = 3,425.87 : x
  2. Step 2: Convert to fraction form
    13,814.12/20,721.16 = 3,425.87/x
  3. Step 3: Cross multiply
    13,814.12x = 20,721.16 × 3,425.87
  4. Step 4: Simplify right side
    13,814.12x = 70,988,000.41
  5. Step 5: Solve for x
    x = 70,988,000.41/13,814.12
  6. Step 6: Final answer
    x = 5,138.80

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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.